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Chapter 4

157

Thermal Unit Failure

If the Thermal Unit fails, perform the following actions one at a time to correct the problem. Do not replace 
non-defective FRUs:

External Mouse Failure

If an external Mouse fails, perform the following actions one at a time to correct the problem. 

Try an alternative mouse.

If the mouse uses a wireless connection, insert new batteries and confirm there is a good connection. See 
the mouse user manual.

If the mouse uses a USB connection, try an alternate USB port.

Try an alternative program to verify mouse operation. Reinstall the program experiencing mouse failure.

START

Fan power

wire well

connected?

Connect it well

No

Fan OK?

No

Replace thermal

module

No

Seat it well

No

Replace

CPU

Replace M/B

CPU

heatsink well

seated?

CPU OK?