Lenovo B540 Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual
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- Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 1
IdeaCentre B540-B540P Hardware Maintenance Manual ideaideaideaCentreidea - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 2
- Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 3
IdeaCentre B540-B540P Hardware Maintenance Manual - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 4
Third Edition (July 2013)25th © Copyright Lenovo 2013. LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software are delivered pursuant a General Services Administration "GSA" contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-35F-05925 - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 5
device 16 Exiting the Lenovo BIOS Setup Utility program . . 17 Chapter 6. Symptom-to-FRU Index . . 19 Hard disk drive boot error 19 Power Supply Problems 19 POST error codes 20 Undetermined problems 20 Chapter 7. Locating connectors, controls and components 21 Chapter 8. Replacing hardware - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 6
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information for IdeaCentre B540 & B540P computers listed on the cover. It is intended only for trained servicers who are familiar with Lenovo computer products. Before servicing a Lenovo product, be sure to read the Safety Information. The description of the TV card in this manual is only used - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 8
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safety glasses when you are: hammering, drilling soldering, cutting wire, attaching springs, using solvents, or working in any other conditions that might be hazardous to your eyes. • After service, reinstall all safety shields, guards, labels, and ground wires. Replace any safety device that is - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 10
- Removing or installing Field Replaceable Units (FRUs) • Before if necessary. - Use only one hand when working with powered-on not use worn or broken tools and testers. • touching can cause personal injury and machine damage. • Do not service the following parts B540-B540PHardware Maintenance Manual - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 11
protect users and service personnel from injury. This guide addresses only those without first correcting the problem. Consider these conditions and : 1. Check exterior covers for damage (loose, broken, or sharp edges). 2. Power-off the computer -sensitive devices Any computer part containing - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 12
wrist strap against your skin to eliminate static on your body. • Prevent the part from touching your clothing. Most clothing is insulative and retains a charge even when you are wearing a wrist strap. • Use the black side of a grounded work mat to provide a static-free work surface. The mat - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 13
from devices. CAUTION: When replacing the lithium battery, use only Part Number 45C1566 Heat to more than 100°C (212°F) • Repair or disassemble Dispose of the battery as required by local ordinances or regulations. CAUTION: When laser products (such as CD-ROMs, DVD-ROM drives, fiber optic devices - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 14
than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source. 2 1 CAUTION: Do not place any object weighing more than 82 kg (180 lbs.) on top of rack-mounted devices. 8 IdeaCentre B540-B540PHardware Maintenance Manual - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 15
specifications for your computer. This section lists the physical specifications for your computer. Type IdeaCentre B540 & B540P This section lists the physical specifications. Environment Air temperature: Operating: 10° to 35°C Transit: -20° to 55°C Humidity: Operating: 35% to 80% Transit: 20% to - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 16
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the following conditions and follow the instructions: • If the computer displays a POST error, go to "POST error codes". • If the computer hangs and no error is displayed, continue at step 7. 7. If the test stops and you cannot continue, replace the last device tested. © Copyright Lenovo 2013 11 - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 18
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Setup Utility program." You must use the keyboard when using the Lenovo BIOS Setup Utility menu. The keys used to perform various tasks are displayed on the bottom of each screen. Using passwords You can use the Lenovo BIOS Setup Utility program to set passwords to prevent unauthorized persons from - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 20
displayed every time you access the Lenovo Lenovo BIOS Setup Utility program (see "Starting the Lenovo Lenovo BIOS Setup Utility program (see "Starting the Lenovo will display be displayed. Type display that changes have been saved. 4. Return to the Lenovo cannot start the Lenovo BIOS Setup Utility - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 21
new password line item. A setup notice will display that changes have been saved. 4. Return to the Lenovo BIOS Setup Utility program menu and select the Exit devices can be used. ATA Drive Setup Select IDE or ACHI mode. Device driver support is required for ACHI mode. Depending on how the hard disk - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 22
. Read the information displayed on the right side of the screen. 4. Use - and ¯ arrows to select a device. Use the or keys to move a device up or down. Use the key to exclude the device from or include the device in the boot sequence. 5. Return to the Lenovo BIOS Setup Utility program - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 23
press the Esc key several times. Do one of the following: • If you want to save the new settings, select Save changes and Exit from the menu. When the Save & reset window shows, select the Yes button, and then press the Enter key to exit the Lenovo BIOS Setup Utility program. • If you - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 24
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an operating system on the boot drive. The drive must be formatted. Do the following: 1. Attempt to back-up the data on the failing hard disk drive. 2. Use the operating system to format the hard disk drive. Replace the hard disk drive. Power Supply Problems Follow these procedures if you suspect - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 26
RAM e. Hard disk drive f. Disk drive 3. Power-on the computer to re-test the system. 4. Repeat steps 1 through 3 until you find the failing device or component. If all devices and components have been removed and the problem continues, replace the system board. 20 IdeaCentre B540-B540PHardware - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 27
2. Built-in camera 3. Built-in IR Emitter (do not block, selected models only) 4. Hard disk drive indicator 5. Bluetooth status indicator 6. Wi-Fi status indicator 7. TV indicator 8. Volume down 9. Volume up 10. Brightness down 11. Brightness up 12. Novo vision button 13. PC mode / HDMI-in - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 28
and components on the left and right side of the computer. 1 2 1. Optical drive 2. TV buttons (selected models only) 3. USB connector 4. Headphone port 3 4 5 6 7 8 5. Microphone port 6. USB connector 7. Memory card reader 8. Power button 22 IdeaCentre B540-B540PHardware Maintenance Manual - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 29
Rear view The following illustration shows the location of connectors and components on the rear of the computer. 8 7 8 6 1 1. Ethernet port 2. USB connectors 3. HDMI-OUT connector 4. HDMI-IN connector (selected models only) 2 34 5 5. AV-IN connectors (selected models only) 6. TV tuner ports - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 30
12. Motherboard 13. Hard disk drive 11 12 14. Optical disk drive 15. Hardware TV Scale Board 16. WLAN card 17. Speakers 18. Converter 19. Heat-sink 20. Infra red module 21. System fans 22. Camera 23. Hardware TV tuner board 24. Hardware TV switch board 25. Touch module 26. Bluetooth module 24 - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 31
the motherboard. 25 23 24 23 22 1 2 3 4 5 6 7 8 9 10 1. Touch Control Board Connector 2. SATA Power Connector 3. LVDS Connector 4. SATA Connector 5. SATA Connector 6. PSU P1 Connector 7. Converter Connector 8. HWTV Module Connector 9. B-CAS Connector 10. Mini PCI Connector 11. Bluetooth Connector - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 32
5. Fan Connector 6. Debug Port The following illustration shows the locations of parts on the digital hardware TV board. (ATS-C type) 1 2 3 4 5 6 6. Debug Port 7. Fan Connector The following illustration shows the locations of parts on the digital hardware TV board. (DVB-T type) 1 2 3 4 5 6 - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 33
. To obtain copies of the Safety and Warranty Guide, go to the Support Web site at: http://consumersupport.lenovo.com. Note: Use only parts provided by Lenovo. General information Pre-disassembly instructions Before proceeding with the disassembly procedure, make sure that you do the following - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 34
: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. To replace the keyboard and mouse Step 1. Step 2. Step 3. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut down the operating system, and turn off the computer and all attached - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 35
cover. Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage. To remove the computer cover: Chapter 8. Replacing hardware 29 - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 36
: For this procedure, it helps to place the computer face-down on a soft flat surface. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the screen surface from scratches or other damage. To remove the computer stand: 30 IdeaCentre B540-B540PHardware Maintenance Manual - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 37
media (disks, CDs, DVDs or memory cards) from the drives, shut down the operating system, and turn off the computer and all attached devices. hear a "pa" sound indicating the stand has been locked. 2 1 2 Replacing a memory module Attention: Turn off the computer and wait 3 to 5 minutes to - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 38
for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage. To replace the hard disk drive Step 1. Step 2. Step 3. Step 4. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut down the - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 39
and release the hard disk drive from the bracket. Step 7. Install the new hard disk drive as follows: a. Line up the new hard disk drive with the bracket and secure it with the pins. b. Slide the hard disk drive and bracket back into position. Step 8. Reattach the rear cover. Replacing the optical - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 40
drive cover so that the disk springs out as shown. Step 7. Remove the 2 screws that secure the optical drive to the metal bracket. 1 Step 8. Use a small flat head screwdriver to press and push out the pins that secure the cover to the disk. 2 3 34 IdeaCentre B540-B540PHardware Maintenance Manual - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 41
. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage. To remove the middle cover Step 1. Step 2. Step 3. Step 4. Step 5. Step 6. Step 7. Step 8. Remove any media (disks, CDs, DVDs, or memory cards) from the drives - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 42
middle cover upward with two hands to remove it from pins. 3 2 1 3 2 Step 10. Slide the middle cover out as shown. 4 (From left to right) 4 Step 11. cable to the same connector. Step 12. Reattach the optical drive, computer stand and the rear cover. 36 IdeaCentre B540-B540PHardware Maintenance Manual - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 43
. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage. To replace the converter board: Step 1. Step 2. Step 3. Step 4. Step 5. Step 6. Step 7. Step 8. Remove any media (disks, CDs, DVDs, or memory cards) from the drives - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 44
for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage. To replace the EMI cover Step 1. Step 2. Step 3. Step 4. Step 5. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 45
procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage. To replace the camera: Step 1. Step 2. Step 3. Step 4. Step 5. Step 6. Step 7. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 46
flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage. To replace the Bluetooth module: Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 47
flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage. To replace the battery Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating system - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 48
procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage. To replace the system fan Step 1. Step 2. Step 3. Step 4. Step 5. Step 6. Step 7. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 49
Step 9. Remove the 4 screws that secure the system fan to the heat-sink and lift the system fan up to remove it. Step 10. Separate the defective fan from the good one as shown. Step 11. Reattach the EMI cover, middle cover, optical drive, computer stand and the rear cover. Removing the power supply - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 50
protect the computer screen from scratches or other damage. To replace the heat-sink: Step 1. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut down the operating system, and turn off the computer and all attached devices. 44 IdeaCentre B540-B540PHardware Maintenance Manual - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 51
the optical drive". Step 7. Remove the middle cover. Refer to "Removing the middle cover". Step 8. Remove the EMI cover. Refer to "Removing the EMI cover". Step 9. Remove the system fans. Refer to "Replacing the system fans". Step 10. Remove the 2 screws that secure the system fan supporting bracket - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 52
cover. Refer to "Removing the middle cover". Step 8. Remove the EMI cover. Refer to "Removing the EMI cover". Step 9. Remove the system fans. Refer to "Replacing the system fans". Step 10. Remove the heat-sink. Refer to "Replacing the heat-sink". 46 IdeaCentre B540-B540PHardware Maintenance Manual - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 53
straight up and out of the socket. Attention: Do not touch the gold contacts on the bottom of the microprocessor. When handing the microprocessor, touch only the sides. Note: Do not drop anything onto the are aligned with the tabs in the microprocessor socket. Chapter 8. Replacing hardware 47 - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 54
, or other soft cloth to protect the computer screen from scratches or other damage. To replace the rear I/O module: Step 1. Step 2. Step 3. Step 4. Step 5. Step 6. Step 7. Step 8. Step 9. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut down the operating system, and turn - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 55
computer stand and the rear cover. Replacing the Wi-Fi card Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. To replace the Wi-Fi card: Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating system, and - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 56
drive. Refer to "Replacing the optical drive". Step 7. Remove the middle cover. Refer to "Removing the middle cover". Step 8. Remove the EMI cover. Refer to "Removing the EMI cover". Step 9. Remove the screw that secures the Wi-Fi card to the motherboard. Step 10 B540-B540PHardware Maintenance Manual - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 57
the optical drive. Refer to "Replacing the optical drive". Step 7. Remove the middle cover. Refer to "Removing the middle cover". Step 8. Remove the EMI cover. Refer to "Removing the EMI cover". Step 9. Remove the screw that secures the TV-Tuner card to the motherboard. Step 10. Disconnect the - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 58
. To replace the touch control board: Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut touch cables from the touch control board. Step 10. Remove the 2 screws that secure the touch control board to the chassis. 52 IdeaCentre B540-B540PHardware Maintenance Manual - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 59
to the new touch control board. Step 13. Reattach the EMI cover, middle cover, optical drive, computer stand and the rear cover. Replacing the scalar board removing the cover. To replace the scalar board Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 60
to let it cool down before removing the cover. To replace the motherboard: Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating system, and turn off the computer and all attached devices. Step 2. Unplug all power cords from electrical outlets. Step - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 61
the new motherboard. g. Install the heat-sink to the new motherboard. h. Install the system fans to the new motherboard. i. Install the TV scalar board to the new motherboard. j. Install the rear I/O module to the new motherboard. k. Connect the antenna cable(s) to the TV-Tuner card. l. Connect all - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 62
Step 9. Remove the converter. Refer to "Replacing the converter". Step 10. Remove the system fan. Refer to "Replacing the system fan". Step 11. Remove the battery. Refer to "Replacing the battery". Step 12. Remove the heat-sink. Refer to "Replacing the heat-sink". Step 13. Remove the CPU. Refer to - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 63
. f. Attach the touch control board, camera, Wi-Fi card, rear I/O module, scalar board, TV-Tuner card, power supply, speaker system, CPU, heat-sink module, battery, memory, system fan, converter board, hard disk drive, to the motherboard and chassis. g. To get the best display quality for your - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 64
parts that are slightly more difficult to replace. • N-identifies parts that are not to be replaced by the customer. 26 1 25 24 2 23 1 22 3 21 4 20 5 19 18 6 17 7 16 15 8 14 9 13 10 65 CPU 58 IdeaCentre B540-B540PHardware Maintenance Manual 12 Lenovo P/N CRU ID 1100335 N 1100337 - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 65
/6/1155 95 D2 CPU I I3-3240 3.4/1600/3/1155 55 L1 CPU I I3-3220 3.3/1600/3/1155 55 L1 CPU I I3-2130 3.4/1333/3/1155 65 Q0 for China yuan HWTV ATV for India RAM M471B5773DH0-CK0 HMT325S6CFR8C-PB MT8KTF25664HZ-1G6M1 Elp_R 1100228 1 1100232 1 1100425 1 1100426 1 Chapter 8. Replacing hardware 59 - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 66
.0 200w PSU® 36002045 N Huntkey HKF2002-32 ES5.0 200W PSU® 36002046 N FSP FSP200-20SI ES5.0 200W PSU® 36200225 N 16 WLAN CBT AR9485 11n SB HMC Wifi card (wow1) 11200354 N LTN RTL8188CE 11n SB HMC Wifi card (wow1) 11200352 N 60 IdeaCentre B540-B540PHardware Maintenance Manual - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 67
LCD Module For LG W/O Touch B540 LCD Module For Sumsang W/O Touch B540 LCD Module For CMI W/O Touch B540 LCD Module For LG 3D W/O Touch B540 LCD Module For LG W/Touch B540 LCD Module For Sumsang W/Touch B540 LCD Module For CMI W/Touch B540 LCD Module For LG 3D W/Touch B545 3D FPR glass/both glasses - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 68
Antenna Wireless antenna-black Wireless antenna-white Cable B540 Converter to panel cable For LG&CMI B540 Converter to panel cable For Sumsang B540 Converter to panel cable For LG 3D B540 HWTV Function 7 key Board Cable B540 Conveter Carble For HWTV B540 HDD&ODD Sata Cable B540 Touch FFC B540 Touch - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 69
Heat Sink B540 TAISOL UMA Heat Sink Other Boards B540 Scalar Board for ATSC(USA) 10 B540 IO Board W/ AV_IN W/USB3.0 B540 IO Board W/O AV_IN W/O HDMI_IN B540 IO Board W/O AV_IN W/USB3.0 B540 IO Board W/ AV_IN W/ HDMI_IN B540 B-Cas Board B540 Function Status Display Board 25 B540 LED Touch - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 70
10 B540Rear IO Board W/1TV_AV_HDMIIN_HDMIOUT B540Rear IO Board W/1TV_HDMIIN_HDMIOUT B540Rear IO Board W/1TV_HDMIOUT B540Rear IO Board W/2TV_HDMIOUT B540Rear IO Board W/2TV_HDMIIN B540Rear IO Board W/HDMIOUT B540Rear IO Board W/HDMIOIN_HDMIOUT B540 Rear I/O Bracket B540 ODD Supporting - Lenovo B540 | Lenovo IdeaCentre B540-B540P Hardware Maintenance Manual - Page 71
service representative might find helpful. Power management Power management reduces the power consumption of certain components of the computer such as the system power supply, processor, hard disk drives all operating systems support ACPI BIOS card to wake the System. © Copyright Lenovo 2013 65
IdeaCentre B540–B540P
Hardware Maintenance Manual