Lenovo B590 Hardware Maintenance Manual - Page 68

System board assembly and USB board, Removal steps of I/O board, When installing

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Removal steps of I/O board Remove the screws 1 , and then detach the cable. Remove the I/O board 4 . 1 1 4 2 3 Step 1 Screw (quantity) M2 × 5 mm, flat-head, nylon-coated (2) Color Black Torque 1.85 kgf-cm When installing: Ensure that the cable is attached firmly to the system board. 1150 System board assembly and USB board Important notices for handling the system board: When handling the system board, bear the following in mind: • Be careful not to drop the system board on a bench top that has a hard surface, such as metal, wood, or composite. • Avoid rough handling of any kind. • At every point in the process, be sure not to drop or stack the system board. • If you put a system board down, be sure to put it only on a padded surface such as an ESD mat or a corrugated conductive surface. 62 Hardware Maintenance Manual

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Removal steps of I/O board
Remove the screws
1
, and then detach the cable. Remove the I/O board
4
.
3
2
1
1
4
Step
Screw (quantity)
Color
Torque
1
M2 × 5 mm, flat-head, nylon-coated (2)
Black
1.85 kgf-cm
When installing:
Ensure that the cable is attached firmly to the system board.
1150 System board assembly and USB board
Important notices for handling the system board:
When handling the system board, bear the following in mind:
•
Be careful not to drop the system board on a bench top that has a hard surface, such as metal, wood, or composite.
•
Avoid rough handling of any kind.
•
At every point in the process, be sure not to drop or stack the system board.
•
If you put a system board down, be sure to put it only on a padded surface such as an ESD mat or a corrugated
conductive surface.
62
Hardware Maintenance Manual