1180 System Board - Lenovo ThinkPad P50 Hardware Maintenance Manual

When installing:
• Do not touch the areas marked
• Ensure that the fan connector is attached firmly.
• Each screw is marked with a number on the thermal fan assembly. When installing, follow the screw
number to tighten the screws in ascending numerical order; otherwise, the system board assembly
might be damaged.
• If you want to re-use the old thermal fan assembly, remove the thermal grease first, and then apply new
thermal grease to the thermal fan assembly, at an amount of 0.2 grams, before you attach it to the
system board. Either too much or too less application of grease can cause a thermal problem due to
imperfect contact with a component.

1180 System board

Important notices for handling the system board
When handling the system board, read the following:
• The system board has an accelerometer, which can be broken when several thousands of G-forces
are applied.
Note: Dropping a system board from a height of as little as 6 inches so that it falls flat on a hard bench
can subject the accelerometer to as much as 6000 G's of shock.
• Be careful not to drop the system board on a bench top that has a hard surface, such as metal, wood, or
composite.
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ThinkPad P50 Hardware Maintenance Manual
3
2f
2d
2b
2h
a b
and in the following illustrations.
a
a
2g
2a
3
2c
2e
b