HP 6720t HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide
HP 6720t - Compaq Mobile Thin Client Manual
UPC - 883585721658
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- HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 1
HP Compaq 6720t Mobile Thin Client Maintenance and Service Guide - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 2
in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. First Edition: January 2008 Document Part Number: 466357-001 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 3
on your lap or obstruct the computer air vents. Use the computer only on a hard, flat surface. Do not allow another hard surface, such as an adjoining optional printer, or a soft surface, such as pillows or rugs or clothing, to block airflow. Also, do not allow the AC adapter to contact the skin or - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 4
iv Safety warning notice - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 5
...11 Computer major components 12 Plastics Kit ...16 Miscellaneous parts ...17 Sequential part number listing 18 4 Removal and replacement procedures Preliminary replacement requirements 21 Tools required ...21 Service considerations 21 Plastic parts 21 Cables and connectors 22 Drive handling - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 6
Equipment guidelines 25 Unknown user password 26 Component replacement procedures 27 Serial number ...27 Computer feet ...28 Battery ...29 Flash drive ...30 Memory module ...31 Optical drive ...33 Keyboard ...35 RTC battery ...38 Heat sink ...39 WLAN module ...41 Switch cover ...43 Display - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 7
Audio-out (headphone) ...90 Audio-in (microphone) ...90 External monitor ...91 RJ-11 (modem) ...92 RJ-45 (network) ...93 Universal Serial Bus ...93 9 Power cord set requirements Requirements for all countries and regions 94 Requirements for specific countries and regions 95 10 Recycling Battery - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 8
viii - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 9
1 Product description Category Product Name Processors Chipset Graphics Panel Memory Flash drive Optical drives Diskette drive Audio Modem Ethernet Wireless External media card Ports Description HP Compaq 6720t Mobile Thin Client Intel® Celeron® M423 1.06-GHz processor 1-MB L2 cache, 533-MHz front - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 10
-ion battery Support for optional 12- or 8-cell accessory battery Security Supports Kensington security lock Operating system Preinstalled: Microsoft® Windows® XPe Serviceability End-user replaceable parts: AC adapter Battery (system) Memory module Optical drive RTC battery WLAN module - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 11
antennae (2) (2) Display release latch Function Send and receive signals from one or more wireless devices. These antennae are not visible from the outside of the computer. Opens the computer. Top components 3 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 12
source, the light turns off when all batteries in the computer are fully charged. If the computer is not plugged into an external power source, the light stays off until the battery reaches a low battery level. Blinking: The flash drive or optional optical drive is being accessed. On: Caps lock is - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 13
on the front of the computer is visible whether the computer is open or closed. †The 2 power lights display the same information. The light on the power button is visible only when the computer is open. The power light on the front of the computer is visible whether the computer is open or closed - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 14
Keys Item (1) Component esc key (2) fn key (3) Windows logo key (4) Windows applications key (5) Numeric keypad keys (6) Function keys Function Displays system information when pressed in combination with the fn key. Executes frequently used system functions when pressed in combination - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 15
TouchPad Item Component Function (1) TouchPad* Moves the pointer and selects or activates items on the screen. (2) Left TouchPad button* Functions like the left button on an external mouse. (3) Right TouchPad button* Functions like the right button on an external mouse. (4) TouchPad - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 16
: If the computer is plugged into an external power source, the light turns off when all batteries in the computer are fully charged. If the computer is not plugged into an external power source, the light stays off until the battery reaches a low battery level. Blinking: The flash drive or optional - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 17
) jack (3) USB ports (2) (4) Optical drive (select models only) Left-side components Function Produces sound when connected to optional powered stereo speakers, headphones, ear buds, a headset, or television audio. Connects an optional computer headset microphone, stereo array microphone, or - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 18
Connects an AC adapter. Connects an external VGA monitor or projector. Item Component (1) Battery bay (2) Battery release latches (2) (3) Accessory battery connector (4) Business card holder (5) Memory module compartment (6) Flash drive bay (7) Vent (8) Docking connector Function - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 19
3 Illustrated parts catalog Serial number location When ordering parts or requesting information, provide the computer serial number and model number located on the bottom of the computer. Serial number location 11 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 20
Computer major components Item (1) Description 15.4-inch, WXGA, antiglare display assembly (includes display panel cable and 2 wireless antenna transceivers and cables) Display internal components: Display bezel Spare part number 467783-001 466164-001 12 Chapter 3 Illustrated parts catalog - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 21
(2) Switch cover (includes LED board and cable) (3) Keyboards For use in Belgium For use in the Czech Republic (includes replacement thermal material) (5) Broadcom 802.11a/b/g WLAN modules: Spare part number 466166-001 466167-001 417520-001 481424-181 481424-221 Computer major components 13 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 22
with the system board frame, spare part number 480894-001. Plastics Kit (see Plastics Kit on page 16 for more Plastics Kit spare part information): 417527-001 PC Card slot bezel Memory module compartment cover (includes one captive screw, secured by a C-clip) Flash drive bay cover (includes - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 23
Item Description (16) (17) (18) 1024-MB, PC2-5300, 667-MHz, DDR2 memory module 6-cell, 47-Wh Li-ion battery 8X Max DVD-ROM Drive (includes bezel and bracket) Spare part number 414046-001 467784-001 467782-001 Computer major components 15 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 24
Plastics Kit Item Description Plastics Kit: (1) Flash drive bay cover (includes 2 captive screws, secured by C-clips) (2) PC Card slot bezel (3) Memory module compartment cover (includes one captive screw, secured by a C-clip) Spare part number 417527-001 16 Chapter 3 Illustrated parts catalog - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 25
Miscellaneous parts Description 65-W HP Smart Adapter Power cords: For use in Australia and New T8M2.5×7.0 screw ● Torx T8M2.5×6.0 screw ● Torx T8M2.5×5.0 screw ● Torx T8M2.5×4.0 screw Spare part number 391172-001 246959-011 246959-201 246959-291 246959-AD1 246959-001 417526-001 Miscellaneous - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 26
-AD1 Power cord for use in South Korea 391172-001 65-W HP Smart Adapter 414046-001 1024-MB, PC2-5300, 667-MHz, DDR2 memory module 417520-001 Switch cover (includes LED board and cable) 417526-001 Screw Kit 417527-001 Plastics Kit (see Plastics Kit on page 16 for more Plastics Kit spare part - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 27
Wh Li-ion battery 468102-001 Heat sink (includes replacement thermal material) 480828-001 Audio/USB board (includes audio board cable and USB board cable) 480829-001 PC Card assembly 480830-001 Rubber Feet Kit 480894-001 System board frame (includes modem module cable) 481424-001 Keyboard for use in - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 28
Spare part Description number 481424-BG1 For use in Slovenia 481424-B31 For use in Israel 481424-B71 For use in Switzerland 481424-DD1 For use in Iceland 481424-DJ1 For use in Greece 20 Chapter 3 Illustrated parts catalog - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 29
screwdrivers ● Torx T8 screwdriver Service considerations The following sections include some parts Using excessive force during disassembly and reassembly can damage plastic parts. Use care when handling the plastic parts. Apply pressure only at the points designated in the maintenance instructions - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 30
a flash drive, shut down the computer. If you are unsure whether the computer is off, turn the computer on, and then shut it down through the operating system. Before handling a drive, be sure that you are discharged of static electricity. While handling a drive, avoid touching the connector. Before - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 31
provide some protection, but in many cases, ESD contains enough power to alter device parameters or melt silicon junctions. A discharge of life expectancy. CAUTION: To prevent damage to the computer when you are removing or installing internal components, observe these precautions: Keep components in - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 32
parts and assemblies with conductive or approved containers or packaging. ● Keep ESD-sensitive parts in their containers until the parts ESD-sensitive parts from assemblies in ● Use conductive field service tools, such as cutters ● Handle ESD-sensitive components, parts, and assemblies by the case - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 33
strap snugly against the skin at all times. On grounded mats with banana-plug connectors, use alligator clips to connect a wrist strap. ● When standing, use foot straps Static-dissipative tables or floor mats with hard ties to the ground ● Field service kits ● Static awareness labels ● Material- - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 34
system. 2. Disconnect all external devices connected to the computer. 3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 29). 5. Remove the real-time clock - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 35
, replaced, or loosened when servicing the computer. Make special note of each screw size and screw lock location during removal and replacement. Serial number Report the computer serial number to HP when requesting information or ordering spare parts. The serial number is located on the bottom - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 36
feet The computer feet are adhesive-backed rubber pads. The feet are included in the Rubber Kit, spare part number 480830-001. There are four oblong rubber feet (1) and four square rubber feet (2), that attach to the base enclosure in the locations illustrated below. 28 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 37
then unplugging the AC adapter from the computer. Remove the battery: 1. Turn the computer upside down on a flat surface, with the battery bay toward you. 2. Slide the battery release latches (1) to release the battery. 3. Remove the battery (2) from the computer. Install the battery by sliding it - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 38
devices connected to the computer. 3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 29). Remove the flash drive: 1. Position the computer with the front - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 39
to reassemble and install the flash drive. Memory module Description 1024-MB (PC2-5300, 667-MHz, DDR2) Spare part number 414046-001 Before removing the memory module, follow these steps: 1. Shut down the computer. If you are unsure whether the computer is off, turn the computer on, and then - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 40
in the Plastics Kit, spare part number 417527-001. 3. Spread the retaining tabs (1) on each side of the memory module slot to release the memory module. (The edge of the module opposite the slot rises away from the computer.) 4. Remove the memory module (2) by pulling the module away from the slot - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 41
devices connected to the computer. 3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 29). Remove the optical drive: 1. Position the computer with the left - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 42
7. Remove the optical drive bracket (2). Reverse this procedure to reassemble and install an optical drive. 34 Chapter 4 Removal and replacement procedures - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 43
-B31 The United States Norway 481424-091 Spare part number 481424-131 481424-251 481424-171 481424-231 computer. 3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 44
: 1. Remove the two Torx T8M2.5×9.0 screws that secure the keyboard to the computer. 2. Turn the computer display-side up, with the front toward you. 3. Open the computer as far as possible. 4. Slide the four keyboard retention tabs (1) toward you. The tabs are located between the esc and f1 keys - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 45
7. Release the zero insertion force (ZIF) connector (1) to which the keyboard cable is attached, and disconnect the keyboard cable (2) from the system board. 8. Remove the keyboard. Reverse this procedure to install the keyboard. Component replacement procedures 37 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 46
unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 29). 5. Remove the keyboard (see Keyboard on page 35). Remove the RTC battery: ▲ Use a non-conductive tool to remove the RTC battery from the socket on the system board. Reverse this procedure to install the RTC - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 47
external devices connected to the computer. 3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 29). 5. Remove the keyboard (see Keyboard on page 35). Remove - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 48
Reverse this procedure to install the heat sink. 40 Chapter 4 Removal and replacement procedures - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 49
by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 29). 5. Remove the keyboard (see Keyboard on page 35). 6. Remove the heat sink (see Heat sink on page 39). Remove the WLAN module: 1. Disconnect the - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 50
3. Remove the WLAN module (3) by pulling the module away from the slot at an angle. NOTE: WLAN modules are designed with a notch (4) to prevent incorrect installation. Reverse this procedure to install the WLAN module. 42 Chapter 4 Removal and replacement procedures - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 51
external devices connected to the computer. 3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 29). 5. Remove the keyboard (see Keyboard on page 35). Remove - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 52
7. Remove the switch cover (2) by lifting it straight up. Reverse this procedure to install the switch cover. 44 Chapter 4 Removal and replacement procedures - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 53
by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 29). 5. Disconnect the wireless antenna cables from the WLAN module (see WLAN module on page 41). 6. Remove the keyboard (see Keyboard on page 35 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 54
5. Remove the six Torx T8M2.5×9.0 screws (1) that secure the display assembly to the computer. 6. Lift the display assembly (2) straight up and remove it. 7. If it is necessary to replace the display bezel, display inverter, or display hinges, remove the - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 55
9. Remove the display bezel (4). The display bezel is available using spare part number 466164-001. 10. If it is necessary to replace the display inverter, disconnect the display panel cable (1) and the backlight cable (2) from the display inverter. - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 56
(1) that secure each display hinge to the display panel. 15. Remove the display hinges (2). The left and right display hinges are available using spare part number 466166-001. Reverse this procedure to reassemble and install the display assembly. 48 Chapter 4 Removal and replacement procedures - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 57
the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 29). 5. Remove the following components: a. Optical drive (see Optical drive on page 33) b. Keyboard (see Keyboard on - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 58
board. 5. Remove the four Torx T8M2.5×5.0 screws (2) that secure the top cover to the computer. 6. Lift the rear edge of the top cover (1) and swing it up and forward until 10. Remove the top cover. Reverse this procedure to install the top cover. 50 Chapter 4 Removal and replacement procedures - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 59
the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 29). 5. Remove the following components: a. Optical drive (see Optical drive on page 33) b. Keyboard (see Keyboard on - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 60
the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 29). 5. Remove the following components: a. Flash drive (see Flash drive on page 30) b. Optical drive (see Optical drive on page 33) c. Keyboard (see Keyboard on - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 61
are removed from the defective system board and installed on the replacement system board: ● Memory module (see Memory module on page 31) ● WLAN module (see WLAN module on page 41) Remove the system board and system board frame: 1. Turn the computer upside down, with the front toward you. 2. Remove - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 62
9. Remove the system board frame and system board (3) from the base enclosure. 10. Release the modem module cable (1) from the two clips built into the system board. 11. Release the RJ-11 connector (2) from the clip built into the system board. 12. Remove the three Torx T8M2.5×4.0 screws (3) that - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 63
the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 29). 5. Remove the following components: a. Flash drive (see Flash drive on page 30) b. Optical drive (see Optical drive on page 33) c. Keyboard (see Keyboard on - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 64
system board right side up, with the front toward you. 4. Disengage the hook on the PC Card assembly from the tab (1) on the system board connector. 5. Remove the PC Card assembly (2). Reverse the preceding procedure to install the PC Card assembly. 56 Chapter 4 Removal and replacement procedures - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 65
the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 29). 5. Remove the following components: a. Flash drive (see Flash drive on page 30) b. Optical drive (see Optical drive on page 33) c. Keyboard (see Keyboard on - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 66
the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 29). 5. Remove the following components: a. Flash drive (see Flash drive on page 30) b. Optical drive (see Optical drive on page 33) c. Keyboard (see Keyboard on - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 67
2. Lift the rear edge of the audio/USB board (2) until the board is clear of the base enclosure. 3. Remove the audio/USB board from the base enclosure. Reverse this procedure to install the audio/USB board. Component replacement procedures 59 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 68
working or will not load. NOTE: Some of the Computer Setup menu items listed in this guide may not be supported by your computer. NOTE: Pointing devices are not supported in Computer Setup. You must use the keyboard to navigate and make selections. To start Computer Setup: 1. Turn on or restart the - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 69
the screen. Because Computer Setup is not Windows-based, it does not support the TouchPad. Navigation Computer Setup, use the arrow keys to select File > Save changes and exit. Then follow the instructions on the screen. Your preferences go into effect when the computer restarts. NOTE: Your password - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 70
for the computer and the batteries in the system. ● View specification information for the processor, cache and memory size, system ROM, video revision, and keyboard controller version. Replace the configuration settings in Computer Setup with the original factory settings. (Password settings and - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 71
/disable internal network adapter boot and set support. When enabled, USB legacy support allows the following: ◦ Use of a USB keyboard in Computer Setup even when a Windows operating system is not running. ◦ Startup from bootable USB devices, including a hard drive, diskette drive, or optical drive - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 72
6 Specifications Computer specifications Metric U.S. Dimensions Length 26.0 cm 10.23 in Width 35.7 cm 14.05 in Height (front to rear) 3.0 to 3.6 cm 1.16 to 1.43 in Weight (equipped with optical drive, flash drive, and battery) 2.54 kg 5.6 lbs Input power Operating voltage 19.0 V dc - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 73
surfaces. The computer operates well within this range of temperatures. 15.4-inch, WXGA display specifications Dimensions Height Width Diagonal Number of colors Contrast ratio Brightness Pixel resolution Pitch Format Configuration Backlight Character display Total power consumption Viewing angle - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 74
8X Max DVD-ROM Drive specifications Applicable disc Access time Random Cache buffer Data transfer rate CD-R (24X) CD-RW (10X) CD-ROM (24X) DVD (8X) Multiword DMA mode 2 DVD-ROM (DVD-5, DVD-9, DVD-10, DVD-18, CD-ROM (Mode 1 and 2), CD Digital Audio, CD-XA ready (Mode 2, Form 1 and Form 2), CD-I ( - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 75
System DMA specifications Hardware DMA System function DMA0 Not applicable DMA1* Not applicable DMA2* Not applicable DMA3 Not applicable DMA4 Available for ExpressCard DMA6 Not assigned DMA7 Not assigned *ExpressCard controller can use DMA 1, 2, or 5. System DMA specifications 67 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 76
101-/102-Key or Microsoft® Natural Keyboard IRQ2 Cascaded IRQ3 Intel 82801DB/DBM USB2 Enhanced Host Controller-24CD IRQ4 COM1 IRQ5* Conexant AC-Link Audio Intel 82801DB/DBM SMBus Controller-24C3 Data Fax Modem with SmartCP IRQ6 Diskette drive IRQ7* Parallel port IRQ8 System CMOS - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 77
I/O address specifications I/O address Keyboard controller Unused NMI enable/RTC Unused DMA page registers Unused Port A Unused Interrupt controller no. 2 System function (shipping configuration) Unused DMA controller no. 2 Unused Coprocessor busy clear/reset Unused Unused Secondary fixed disk - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 78
shipping configuration) Entertainment audio Unused Unused Unused Unused Unused Unused Reserved serial port Unused Infrared port Unused Unused Secondary diskette drive controller Parallel port (LPT1/default) Unused FM synthesizer-OPL3 Unused VGA Reserved (parallel port/no EPP support) VGA ExpressCard - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 79
System memory map specifications Size 640 KB 128 KB 48 KB 160 KB 64 KB 15 MB 58 MB 58 MB 2 MB 4 GB 64 KB Memory address Video memory Video BIOS Unused System BIOS Extended memory Super extended memory Unused Video memory (direct access) Unused System BIOS System memory map specifications 71 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 80
7 Screw listing This section provides specification and reference information for the screws and screw locks used in the computer. All screws listed in this section are available in the Screw Kit, spare part number 417526-001. 72 Chapter 7 Screw listing - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 81
diameter 5.0 mm Where used: (1) Two captive screws that secure the flash drive bay cover to the computer (screws are captured on the cover by C-clips) (2) One captive screw that secures the memory module compartment cover to the computer (screw is captured on the cover by a C-clip) Phillips PM2 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 82
Torx T8M2.5×9.0 screw Color Black Quantity 21 Length 9.0 mm Thread 2.5 mm Head diameter 5.0 mm Where used: (1) One screw that secures the optical drive to the computer (2) Two screws that secure the keyboard to the computer 74 Chapter 7 Screw listing - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 83
Where used: 6 screws that secure the display assembly to the computer Where used: 10 screws that secure the top cover to the computer Where used: 2 screws that secure the system board frame to the base enclosure Torx T8M2.5×9.0 screw 75 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 84
Silver Phillips PM2.0×4.0 screw Color Silver Quantity 2 Length 4.0 mm Thread 2.0 mm Head diameter 4.5 mm Where used: 2 screws that secure the optical drive bracket to the optical drive 76 Chapter 7 Screw listing - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 85
Phillips PM2.0×3.0 screw Color Silver Quantity 6 Length 3.0 mm Thread 2.0 mm Head diameter 4.5 mm Where used: 2 screws that secure the WLAN module to the system board Phillips PM2.0×3.0 screw 77 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 86
Where used: 4 screws that secure the heat sink to the computer Phillips PM2.5×3.0 screw Color Black Quantity 4 Length 3.0 mm Thread 2.5 mm Head diameter 5.0 mm Where used: 4 screws that secure the heat sink to the computer 78 Chapter 7 Screw listing - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 87
Phillips PM2.0×2.0 broad-head screw Color Black Quantity 5 Length 2.0 mm Thread 2.0 mm Head diameter 7.0 mm Where used: 3 screws that secure the switch cover to the computer Phillips PM2.0×2.0 broad-head screw 79 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 88
Where used: 2 screws that secure the display assembly right hinge to the computer 80 Chapter 7 Screw listing - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 89
Torx T8M2.5×5.0 screw Color Black Quantity 14 Length 5.0 mm Thread 2.5 mm Head diameter 5.0 mm Where used: 4 screws that secure the display bezel top edge to the display assembly Where used: 6 screws that secure the display panel to the display enclosure Torx T8M2.5×5.0 screw 81 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 90
Where used: 4 screws that secure the top cover to the base enclosure 82 Chapter 7 Screw listing - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 91
Torx T8M2.5×7.0 screw Color Black Quantity 2 Length 9.0 mm Thread 2.5 mm Head diameter 5.0 mm Where used: 2 screws that secure the display bezel bottom edge to the display assembly Torx T8M2.5×7.0 screw 83 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 92
Black Phillips PM2.0×4.0 screw Color Black Quantity 10 Length 4.0 mm Thread 2.0 mm Head diameter 4.5 mm Where used: 8 screws that secure the display hinges to the display panel 84 Chapter 7 Screw listing - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 93
Where used: 2 screws that secure the PC Card assembly to the system board Black Phillips PM2.0×4.0 screw 85 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 94
Torx T8M2.5×4.0 screw Color Black Quantity 5 Length 4.0 mm Thread 2.5 mm Heat width 5.0 mm Where used: 3 screws that secure the system board to the system board frame Where used: 2 screws that secure the audio/USB board to the base enclosure 86 Chapter 7 Screw listing - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 95
Phillips PM2.5×4.0 screw Color Black Quantity 2 Length 4.0 mm Thread 2.5 mm Head diameter 5.0 mm Where used: 2 screws that secure the modem module to the system board Phillips PM2.5×4.0 screw 87 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 96
Torx T8M2.5×6.0 screw Color Black Quantity 5 Length 6.0 mm Thread 2.5 mm Head diameter 5.0 mm Where used: 5 screws that secure the system board frame to the base enclosure 88 Chapter 7 Screw listing - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 97
Hex HM5.0×11.0 screw lock Color Silver Quantity 2 Length 11.0 mm Thread 2.5 mm Head diameter 5.0 mm Where used: 2 screw locks that secure the system board to the system board frame Hex HM5.0×11.0 screw lock 89 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 98
8 Connector pin assignments Audio-out (headphone) Pin Signal 1 Audio out, left channel 2 Audio out, right channel 3 Ground Audio-in (microphone) Pin Signal 1 Audio signal in 2 Audio signal in 3 Ground 90 Chapter 8 Connector pin assignments - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 99
External monitor Pin Signal 1 Red analog 2 Green analog 3 Blue analog 4 Not connected 5 Ground 6 Ground analog 7 Ground analog 8 Ground analog 9 +5 VDC 10 Ground 11 Monitor detect 12 DDC 2B data 13 Horizontal sync 14 Vertical sync 15 DDC 2B clock External monitor 91 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 100
RJ-11 (modem) Pin Signal 1 Unused 2 Tip 3 Ring 4 Unused 5 Unused 6 Unused 92 Chapter 8 Connector pin assignments - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 101
RJ-45 (network) Pin Signal 1 Transmit + 2 Transmit - 3 Receive + 4 Unused 5 Unused 6 Receive - 7 Unused 8 Unused Universal Serial Bus Pin Signal 1 +5 VDC 2 Data - 3 Data + 4 Ground RJ-45 (network) 93 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 102
of 125 or 250 V AC, as required by the power system of each country or region. ● The appliance coupler must meet the mechanical configuration of an EN 60 320/IEC 320 Standard Sheet C13 connector for mating with the appliance inlet on the back of the computer. 94 Chapter 9 Power cord set requirements - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 103
Requirements for specific countries and regions Country/region Accredited agency Applicable note number Australia EANSW 1 Austria OVE 1 cord must be Type VCTF, 3-conductor, 0.75-mm² conductor size. Power cord set fittings (appliance coupler and wall plug) must bear the certification mark - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 104
battery in general household waste. Follow the local laws and regulations in your area for computer battery carefully. NOTE: Materials Disposal. This HP product contains mercury in the backlight in this appendix are general disassembly instructions. Specific details, such as screw sizes, quantities - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 105
Perform the following steps to disassemble the display assembly: 1. Remove all screw covers (1) and screws (2) that secure the display bezel to the display assembly. 2. Lift up and out on the left and right inside edges (1) and the top and bottom inside edges (2) of the display bezel until the bezel - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 106
4. Disconnect all display panel cables (1) from the display inverter and remove the inverter (2). 5. Remove all screws (1) that secure the display panel assembly to the display enclosure. 6. Remove the display panel assembly (2) from the display enclosure. 7. Turn the display panel assembly upside - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 107
10. Remove the display panel frame (2) from the display panel. 11. Remove the screws (1) that secure the backlight cover to the display panel. 12. Lift the top edge of the backlight cover (2) and swing it outward. 13. Remove the backlight cover. 14. Turn the display panel right-side up. Display 99 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 108
15. Remove the backlight cables (1) from the clip (2) in the display panel. 16. Turn the display panel upside down. WARNING! The backlight contains mercury. Exercise caution when removing and handling the backlight to avoid damaging this component and causing exposure to the mercury. 17. Remove the - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 109
18. Remove the backlight from the backlight frame. 19. Disconnect the display panel cable (1) from the LCD panel. 20. Remove the screws (2) that secure the LCD panel to the display rear panel. 21. Release the LCD panel (3) from the display rear panel. 22. Release the tape (4) that secures the LCD - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 110
Index A AC adapter, spare part number 17, 18 accessory battery connector 10 antenna disconnecting 41 location 3 audio, product description 1 audio-in jack location 9 pin assignments 90 audio-out jack location 9 pin assignments 90 audio/USB board removal 58 spare part number 14, 19, 58 B base - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 111
components 9 legacy support, Universal Serial Bus (USB) 63 light components 4 lights battery 4, 8 caps lock 4 drive 4, 8 numeric lock 4 power 4, 8 volume mute 4 wireless 4, 8 M memory check 63 memory map specifications 71 memory module product description 1 removal 31 spare part number 15, 18, 31 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 112
94 spare part numbers 17, 18 power light 4, 8 power requirements, product description 2 power-on password 62 processor product description 1 product description audio 1 chipset 1 diskette drive 1 display panel 1 Ethernet 1 external media cards 1 flash drive 1 graphics 1 keyboard 2 memory module - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 113
5 volume mute light 4 volume up button 5 W Windows applications key 6 Windows logo key 6 wireless antenna disconnecting 41 location 3 wireless button 5 wireless light 4, 8 wireless, product description 1 WLAN module removal 41 spare part numbers 13, 41 workstation guidelines 24 Index 105 - HP 6720t | HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service Guide - Page 114
HP Compaq 6720t Mobile Thin Client
Maintenance and Service Guide