1150 System Board Assembly And Usb Board - Lenovo B590 Hardware Maintenance Manual

Removal steps of I/O board
1
Remove the screws , and then detach the cable. Remove the I/O board
Step Screw (quantity)
1
M2 × 5 mm, flat-head, nylon-coated (2)
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.
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Hardware Maintenance Manual
4
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Color Torque
Black 1.85 kgf-cm