Lenovo ThinkPad T420si Hardware Maintenance Manual - Page 113

LCD cable, 1050 PCI Express Mini Card for wireless LAN

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Removal steps of LED sub card 2 3 1 Step 2 Screw (quantity) M2 × 3 mm, small-head, nylon-coated (1) Color Silver Torque 0.181 Nm (1.85 kgfcm) When installing: Make sure that the connector is attached firmly. 2050 LCD cable For access, remove these FRUs in order: • "1010 Battery pack" on page 68 • "1020 Serial Ultrabay Slim device or travel bezel" on page 69 • "1030 Solid state drive (SSD) or hard disk drive (HDD)" on page 70 • "1040 DIMM" on page 72 • "1050 PCI Express Mini Card for wireless LAN" on page 74 • "1060 PCI Express Mini Card for wireless WAN" on page 77 • "1070 4-in-1 media card reader" on page 79 • "1080 Keyboard" on page 80 • "1100 Palm rest with fingerprint reader, smart card reader, and speaker" on page 84 • "1110 LCD unit" on page 88 • "1120 DC-in sub card" on page 90 • "1140 Bluetooth-wireless radio switch FPC" on page 91 • "1150 System board, fan assembly, 34-mm ExpressCard reader, and base cover" on page 93 Chapter 8. Removing and replacing a FRU 107

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Removal steps of LED sub card
2
3
1
Step
Screw (quantity)
Color
Torque
2
M2 × 3 mm, small-head, nylon-coated (1)
Silver
0.181 Nm
(1.85 kgfcm)
When installing:
Make sure that the connector is attached firmly.
2050 LCD cable
For access, remove these FRUs in order:
•
“1010 Battery pack” on page 68
•
“1020 Serial Ultrabay Slim device or travel bezel” on page 69
•
“1030 Solid state drive (SSD) or hard disk drive (HDD)” on page 70
•
“1040 DIMM” on page 72
•
“1050 PCI Express Mini Card for wireless LAN” on page 74
•
“1060 PCI Express Mini Card for wireless WAN” on page 77
•
“1070 4–in–1 media card reader” on page 79
•
“1080 Keyboard” on page 80
•
“1100 Palm rest with fingerprint reader, smart card reader, and speaker” on page 84
•
“1110 LCD unit” on page 88
•
“1120 DC-in sub card” on page 90
•
“1140 Bluetooth-wireless radio switch FPC” on page 91
•
“1150 System board, fan assembly, 34-mm ExpressCard reader, and base cover” on page 93
Chapter 8
.
Removing and replacing a FRU
107