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System Board
“Battery” on page 61
“Hard Disk Drive” on page 62
“Combo Bay” on page 63
“Keyboard” on page 70
“LED Board” on page 72
“Upper Heatsink” on page 73
“CPU Board” on page 76
“LCD Panel” on page 77
“Upper Cover” on page 79
“IMM Lower Heatsink” on page 81
“Fan” on page 82
“Speakers” on page 83
Note: Only for 15.0–inch LCD models.
“Power Latch, IR Board, and DC-DC & BATT Board”
on page 85
Note: See “Replacing the System Board” on page 59
before proceeding.
Remove the two screws from the system board and gently
remove the system board from the base cover.
1
2
3
2
Step
Size (Quan-
tity)
Head &
Color Torque
1 M2.5 x 6L (2) Flat head,
black
2.0 kgf-cm
2 M2.5 x 6L (1) Flat head,
black
2.0 kgf-cm
Note: Make sure you use the correct screw for replacement.
86 ThinkPad 390X / i 1700 HMM