Lenovo B490 Hardware Maintenance Manual - Page 73

I/O board

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• "1140 I/O board" on page 59 • "1150 System board assembly and USB board" on page 60 Removal steps of LCD unit Release the antenna cables from the cable guides. Then remove the screws 1 . 1 1 1 1 Step 1 Screw (quantity) M2.5 × 6 mm, flat-head, nylon-coated (4) Color Silver Torque 4.0 kgf-cm When installing: • Route the antenna cables along the cable guides. As you route the cables, make sure that they are not subjected to any tension. Tension could cause the cables to be damaged by the cable guides, or a wire to be broken. • Ensure that the LCD connector is attached firmly and make sure that you do not pinch the antenna cables when you attach the LCD assembly. Route the LCD cable along the cable guides. Chapter 7. Removing and replacing a FRU 67

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•
“1140 I/O board” on page 59
•
“1150 System board assembly and USB board” on page 60
Removal steps of LCD unit
Release the antenna cables from the cable guides. Then remove the screws
1
.
1
1
1
1
Step
Screw (quantity)
Color
Torque
1
M2.5 × 6 mm, flat-head, nylon-coated (4)
Silver
4.0 kgf-cm
When installing:
•
Route the antenna cables along the cable guides. As you route the cables, make sure that they are
not subjected to any tension. Tension could cause the cables to be damaged by the cable guides,
or a wire to be broken.
•
Ensure that the LCD connector is attached firmly and make sure that you do not pinch the antenna cables
when you attach the LCD assembly. Route the LCD cable along the cable guides.
Chapter 7
.
Removing and replacing a FRU
67