Lenovo K4450 Hardware Maintenance Manual - Lenovo K4450 and K4450A
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- Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 1
Hardware Maintenance Manual Lenovo K4450 and K4450A - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 2
and the product it supports, be sure to read the general information under Appendix A "Notices" on page 79. First Edition (May 2014) © Copyright Lenovo 2014. LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant a General Services Administration "GSA" contract, use - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 3
manual iii Chapter 1. Safety information . . . . . 1 General safety 1 Electrical safety 1 Safety inspection guide battery pack 23 Chapter 3. Important service information 25 Recovering the computer 53 1070 Backup battery 54 1080 Keyboard 55 1090 Keyboard bezel 57 1110 Lenovo 2014 i - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 4
ii Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 5
About this manual This manual provides service and reference information for the following Lenovo® products. Machine Lenovo K4450 and K4450A Machine Type (MT) 80H0, 20438 This manual provides information about the computer features, specifications, component locations, hardware replacement - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 6
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before you service a Lenovo notebook computer. • "General safety" on page 1 • "Electrical safety" on page 1 • "Safety inspection guide" on object: 1. Make sure that you can stand safely without slipping. 2. Distribute the weight of the object equally between your feet. 3. Use a slow lifting force. - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 8
-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical accident occurs, you can then operate work with very high voltages; Instructions for these precautions are in the personal injury and machine damage. • Do not service the following parts with the power on when they Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 9
service technicians from injury. This guide ). 2. Power off the computer. Disconnect the power cord. batteries. 5. Remove the cover. 6. Check for any obvious non-Lenovo alterations. Use good judgment as to the safety of any non-Lenovo . Notes: 1. Use product-specific ESD procedures when they exceed - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 10
those listed below, to provide protection that meets the specific service requirement. Note: The use of a grounding system to computers. Grounding requirements Electrical grounding of the computer is required for operator safety and correct system function. Proper grounding of the electrical outlet - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 11
DANGER DANGER DANGER DANGER DANGER Chapter 1. Safety information 5 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 12
DANGER 6 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 13
Chapter 1. Safety information 7 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 14
PERIGO PERIGO PERIGO PERIGO PERIGO 8 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 15
PERIGO PERIGO PERIGO DANGER DANGER DANGER Chapter 1. Safety information 9 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 16
DANGER DANGER DANGER DANGER DANGER VORSICHT 10 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 17
VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1. Safety information 11 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 18
VORSICHT VORSICHT VORSICHT 12 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 19
Chapter 1. Safety information 13 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 20
14 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 21
Chapter 1. Safety information 15 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 22
16 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 23
Chapter 1. Safety information 17 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 24
18 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 25
Chapter 1. Safety information 19 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 26
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instructions, ensure that you read the following important notes. Important notes: • Only certified trained personnel should service the computer computer that you are servicing only when a problem recurs. If service technician • Date of service computer problems with the computer computer • Damage - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 28
is supplied when you turn on the computer. 5. Turn off the computer. 6. Disconnect the ac power adapter and install the charged battery pack. 7. Check that the battery pack supplies power when you turn on the computer. If you suspect a power problem, refer to the following topics for a checkout - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 29
Windows 8.1: Do one of the following: - Click Start ➙ Lenovo Solution Center ➙ System ➙ Battery. - Launch the Lenovo Settings program from the Start screen, and then click Power. To check the battery pack, do the following: 1. Turn off the computer and disconnect the ac power adapter. 2. Remove the - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 30
pack. If the voltage still is less than +12.0 V dc after recharging, replace the battery pack. Note: Recharging will take at least three hours, even if the battery status indicator does not turn on. 5. Replace the system board if the new battery pack is not charged. 24 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 31
service information This chapter presents the following information: • "Recovering the computer settings" on page 25 • "Using passwords" on page 25 • "Power management" on page 26 Recovering the computer types of passwords to protect unauthorized access to your computer. © Copyright Lenovo 2014 25 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 32
the user does not do any operation with the keyboard, the hard disk drive, the parallel connector, or the diskette drive within that time. • The battery status indicator blinks orange, indicating that the battery power is low. To cause the computer to return from sleep mode and resume the operation - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 33
user does not do any operation with the keyboard, the hard disk drive, the parallel connector, or the diskette drive within that time. • The timer conditions are satisfied in suspend mode. When the power is turned on, the computer returns from hibernation mode and resumes operation. The hibernation - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 34
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presents the system status indicators that show the status of the computer. 3 21 Table 1. Status indicators Indicator 1 Active Protection System program is disabled. 2 Device access status indicator 3 Battery status indicator © Copyright Lenovo 2014 Green: The hard disk drive is reading or - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 36
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Enables or disables the keyboard light. Puts the computer into sleep mode. To resume normal combination to switch between the computer display and an external monitor. keyboard. Has the same function as the SysRq key on a conventional keyboard. Has the same function as the End key on a conventional keyboard - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 38
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topic introduces the locations of the computer controls, connectors, and indicators. Front view 3 1 2 3 13 12 11 10 9 4 5 6 7 6 8 Figure 1. Front view 1 Camera 2 Keyboard light 3 Microphones 4 ac each status indicator, see Chapter 4 "Status indicators" on page 29. © Copyright Lenovo 2014 33 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 40
service CRU. A Letter "N" in the CRU ID column means that the part is not a CRU. • CRU statement for customers: You can resolve some problems Manual. An electronic version of this manual can be found at http://www.lenovo.com/UserManuals. Follow the on-screen instructions to find the manual for - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 41
than two screws. Once the access panel is removed, the specific CRU is visible. Major FRUs and CRUs This exploded illustration helps Lenovo service technicians identify FRUs or CRUs that they may need to replace when servicing a customer's computer. Refer to "Part numbers for orderable FRUs and CRUs - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 42
22 21 20 23 19 24 18 17 16 15 14 Table 3. Major FRUs and CRUs No. FRU description 1 LCD unit 2 Keyboard bezel with touch pad 3 Fingerprint board cable 4 Fingerprint board 5 Fingerprint board bracket 6 System board 7 DC-in connector bracket 8 DC-in connector 36 Hardware - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 43
disk drive bracket 12 Battery pack 13 Bottom slot card reader slot board 20 Thermal module assembly 21 Power board with cable 22 Keyboard 23 IO Board CRT Port Cable 24 IO Board Cable CRU ID * * LCD module. LCD FRUs and CRUs Lenovo K4450 and K4450A use a 356-mm (14.0-inch), high-definition - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 44
LCD Bezel Hinges Camera and microphones board LCD cover Antennas LCD cable LCD panel CRU ID N N N N N N N Part numbers for orderable FRUs and CRUs When servicing a customer's computer, Lenovo service technicians may use part numbers listed in the following tables to order replacement parts through - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 45
FRU or CRU category 2 Keyboard bezel with touch pad Description I7-4550U LK491S MB W8P DIS I7-4550U LK491S MB DIS I3-4100U LK491S MB W8S DIS I3-4100U LK491S MB W8P DIS I3-4100U LK491S MB W8S I3-4005U 2G LK491S MB W8P I3-4005U 2G LK491S MB W8S I3-4005U 2G W K4450A DIS 3558U 2G W K4450A - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 46
ST500LM000 6G 7mm 500G+8G SSHD 11 Hard disk drive bracket LK490s HDD Bracket 12 Battery pack SA L12S4Z51 14.8V 32Wh 4cell bty T01 13 Bottom slot cover LK490s Lower Lower Case 15 Wireless LAN card 40 Hardware Maintenance Manual 90202491 90203374 16200405 16200330 16200384 16200378 16200194 16200510 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 47
Table 5. Part numbers for non-LCD module FRUs and CRUs (continued) Intel 7260BN 2x2BN+BT PCIE HMC WLAN Intel 7260 Wilkins Peak2 2x2 11ac + BT Combo (HMC) Cbt RTL8723BE 1x1BGN+BT HMC WLAN Ltn RTL8723BE 1x1BGN+BT HMC WLAN 16 Memory module (2 GB) M471B5773DH0-YK0 (D/ 2Gb/35nm) HMT425S6AFR6A-PB (D/4Gb/ - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 48
module assembly LK491s Thermal Module W/FAN 21 Power board with cable LK490s Power Board W/Cable 22 Keyboard JME YJ US 84 black frame KBD W8 JME YanJing Thailand 84 black frame KBD W8 JME cable LK490s Antenna L Part number 90203375 90202498 90203376 90202500 90202501 42 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 49
Table 6. Part numbers for LCD-module FRUs (continued) LK490s LCD Cable 7 LCD panel SEC LTN140AT28-401 HD AG F LED1 NB LCD LGD LP140WH2-TLT1 HD AG F LED1 NB LCD AUO B140XTN03.1 HD LED 1 AG LCD CMI N140BGE-L33 HD AG F LED1 NB LCD 90202490 18200791 18200792 18200693 18201034 Note: Camera and - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 50
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: 1. Go to http://www.lenovo.com/support. 2. Click Download Drivers & Software. The Web site offers three options to begin your search: • Search by product number • Search through the product auto-detect function • Search by product category 3. Follow the instructions on the screen and install the - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 52
problem, reinstall the original FRU before you continue. • Some computers have both a processor board and a system board. If you are instructed Lenovo notebook computer you are servicing the computer: • drivers are calibrated correctly following country specifications. 46 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 53
Manual. An electronic version of this manual can be found at http://www.lenovo.com/UserManuals. Follow the on-screen instructions to find the manual any FRU, turn off the computer, unplug all power cords from electrical outlets, remove the battery pack, and then disconnect any interconnecting - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 54
list for your computer. Any other battery could ignite or explode. Unlock the battery lock 1 . Hold the battery latch in the unlocked position, and then remove the battery pack 2 . 1 2 2 When installing: Install the battery pack in the slot. Ensure that the battery latch and the battery lock are in - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 55
slot cover 2 . 1 2 Step 1 Screw (quantity) M2 × 3 mm, flat-head, nylon-coated (1) 1030 Memory modules For access, remove these FRUs in order: • "1010 Battery pack" on page 48 • "1020 Bottom slot cover" on page 48 Color Black Torque 0.181 Nm (1.85 kgf-cm) Chapter 8. Removing or replacing a FRU - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 56
memory module is firmly installed in the slot and does not move easily. Note: If only one memory module is to be installed into the computer you are servicing, the memory module must be installed in SLOT-0 (slot a ), but not in SLOT-1 (slot b ). a b 50 Hardware Maintenance - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 57
drive assembly For access, remove these FRUs in order: • "1010 Battery pack" on page 48 • "1020 Bottom slot cover" on page • Never remove the drive while the computer is operating or in suspend mode. • The drive startup sequence in the computer you are servicing might have been changed. Be extremely - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 58
hard disk drive bracket. 2 Torque 0.392 Nm (4.0 kgf-cm) 1050 PCI Express Mini Card for wireless LAN For access, remove these FRUs in order: • "1010 Battery pack" on page 48 • "1020 Bottom slot cover" on page 48 52 Hardware Maintenance - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 59
into the main connector, and the white cable into the auxiliary connector. 1060 mSATA solid-state drive For access, remove these FRUs in order: • "1010 Battery pack" on page 48 • "1020 Bottom slot cover" on page 48 Chapter 8. Removing or replacing a FRU 53 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 60
all the information on it if possible. • Never remove the drive while the computer is operating or in suspend mode. Removal steps of the mSATA solid-state drive 181 Nm (1.85 kgf-cm) 2 1070 Backup battery For access, remove these FRUs in order: • "1010 Battery pack" on page 48 • "1020 Bottom slot - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 61
Removal steps of the backup battery DANGER Use only the battery specified in the parts list for your computer. Any other battery could ignite or explode. Carefully pry the backup battery out using a screwdriver. 1080 Keyboard For access, remove these FRUs in order: • "1010 Battery pack" on page 48 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 62
Push hard to unlatch the keyboard. 2 2 Carefully detach the keyboard and then lift it up until you can see how it is connected. 3 56 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 63
connector, and then remove the keyboard. 6 4 5 When installing: Ensure that the keyboard connector is attached firmly. 1090 Keyboard bezel For access, remove these FRUs in order: • "1010 Battery pack" on page 48 • "1020 Bottom slot cover" on page 48 • "1080 Keyboard" on page 55 Chapter 8. Removing - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 64
steps of the keyboard bezel Remove the screws 1 and 2 . 1 1 2 1 1 1 1 1 2 2 1 1 1 Step 1 2 Screw (quantity) M2 × 6 mm, flat-head, nylon-coated (10) M2 × 2.5 mm, flat-head, nylon-coated (3) Color Black Black Torque 0.181 Nm (1.85 kgf-cm) 0.181 Nm (1.85 kgf-cm) 58 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 65
Remove the screws 3 , and then detach the connectors. 4 5 3 3 7 6 8 9 Step 3 Screw (quantity) M2 × 6 mm, flat-head, nylon-coated (2) Color Black When installing: Ensure that all the connectors are attached firmly. Torque 0.181 Nm (1.85 kgf-cm) Chapter 8. Removing or replacing a FRU 59 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 66
fingerprint board with cable For access, remove these FRUs in order: • "1010 Battery pack" on page 48 • "1020 Bottom slot cover" on page 48 • "1040 Hard disk drive assembly" on page 51 • "1080 Keyboard" on page 55 • "1090 Keyboard bezel" on page 57 Removal steps of the fingerprint board bracket and - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 67
Media card reader slot board For access, remove these FRUs in order: • "1010 Battery pack" on page 48 • "1020 Bottom slot cover" on page 48 • "1040 Hard disk drive assembly" on page 51 • "1080 Keyboard" on page 55 • "1090 Keyboard bezel" on page 57 • "1140 System board assembly" on page 63 Color - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 68
Removal steps of the media card reader slot board Detach the cables. 1 2 3 When installing: Ensure that the cables are attached firmly. 62 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 69
PCI Express Mini Card for wireless LAN" on page 52 • "1060 mSATA solid-state drive" on page 53 • "1070 Backup battery" on page 54 • "1080 Keyboard" on page 55 • "1090 Keyboard bezel" on page 57 Important notice for replacing the system board When replacing the system board, observe the following - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 70
can cause damage to the following components, and might cause a system malfunction. When you service the system board, avoid any kind of rough handling. a Graphics chip (for discrete graphics module assembly a b For models with a discrete thermal module assembly a b c 64 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 71
Removal steps of the system board assembly Detach the connectors. 2 1 6 3 4 5 When installing: Ensure that all the connectors are attached firmly. Remove the screws 7 . 7 7 7 Step 7 Screw (quantity) M2 × 3 mm, flat-head, nylon-coated (3) Color Black Torque 0.181 Nm (1.85 kgf-cm) Chapter - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 72
board. 1150 Thermal module assembly For access, remove these FRUs in order: • "1010 Battery pack" on page 48 • "1020 Bottom slot cover" on page 48 • "1040 Hard disk drive assembly" on page 51 • "1080 Keyboard" on page 55 • "1090 Keyboard bezel" on page 57 • "1140 System board assembly" on page 63 66 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 73
of 0.2 grams, on the part marked a and b as shown in the following illustrations. Either too much or too less application of grease can cause a thermal problem due to imperfect contact with a component. Chapter 8. Removing or replacing a FRU 67 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 74
models with a discrete thermal module assembly 1160 Speakers, LCD unit and base cover For access, remove these FRUs in order: • "1010 Battery pack" on page 48 • "1020 Bottom slot cover" on page 48 • "1080 Keyboard" on page 55 • "1090 Keyboard bezel" on page 57 a b 68 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 75
Removal steps of the speakers Remove the screws 1 , and then remove the speakers. 1 1 2 1 1 1 Step 1 Screw (quantity) M2 × 3.1 mm, flat-head, nylon-coated (5) Color Black Torque 0.181 Nm (1.85 kgf-cm) Chapter 8. Removing or replacing a FRU 69 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 76
the LCD unit and the base cover Release the antenna cables from the cable guides. Remove the screws 1 . 11 1 1 1 1 Step 1 Screw ( Nm (4.0 kgf-cm) Cable routing: Route the antenna cables along the cable guides and secure the antenna boards with tapes. Attention: When you route the cables - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 77
the label attached to the customer. Otherwise, you can provide the customer with a letter, stating the original location of the label on the computer and the information on the label, such as the part number, serial number, and product key. The following illustration shows the label locations on - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 78
label 1170 DC-in connector For access, remove these FRUs in order: • "1010 Battery pack" on page 48 • "1020 Bottom slot cover" on page 48 • "1040 Hard disk drive assembly" on page 51 • "1080 Keyboard" on page 55 • "1090 Keyboard bezel" on page 57 • "1140 System board assembly" on page 63 • "1160 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 79
2010 LCD front bezel For access, remove these FRUs in order: • "1010 Battery pack" on page 48 • "1160 Speakers, LCD unit and base cover" on page 68 Removal steps of the LCD front bezel Remove the screws 1 . 1 1 Step 1 - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 80
• "1010 Battery pack" on page 48 • "1160 Speakers, LCD unit and base cover" on page is attached firmly. 2030 LCD panel, LCD cable, and hinges For access, remove these FRUs in order: • "1010 Battery pack" on page 48 • "1160 Speakers, LCD unit and base cover" on page 68 • "2010 LCD front bezel" - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 81
Removal steps of the LCD panel and the LCD cable Remove the screws 1 , and then remove the LCD panel 2 . 1 1 2 1 1 Step 1 Screw (quantity) M2 × 2.5 mm, flat-head, nylon-coated (4) Turn over the LCD panel. Then detach the LCD cable. Color Black Torque 0.181 Nm (1.85 kgf-cm) 5 4 3 When - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 82
the hinges. 2 Color Black Torque 0.181 Nm (1.85 kgf-cm) 2 2040 Antenna assembly and LCD rear cover For access, remove these FRUs in order: • "1010 Battery pack" on page 48 • "1160 Speakers, LCD unit and base cover" on page 68 • "2010 LCD front bezel" on page 73 • "2020 Camera and microphone - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 83
of the LCD rear cover assembly and from the hinges. 1 1 2 1 2 1 1 1 Cable routing: Route the antenna cables along the cable guides and secure the antenna boards with tapes. Attention: When you route the cables, ensure that they are not subject to any tension. Tension could damage - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 84
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the operation of any other product, program, or service. Lenovo may have patents or pending patent applications covering support applications where malfunction may result in injury or death to persons. The information contained in this document does not affect or change Lenovo product specifications - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 86
of Lenovo in the United States, other countries or both: Active Protection System Lenovo Lenovo logo OneKey Microsoft and Windows are trademarks of the Microsoft group of companies. Other company, product, or service names may be trademarks or service marks of others. 80 Hardware Maintenance Manual - Lenovo K4450 | Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 87
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