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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.
1. Try an alternative mouse.
2. If the mouse uses a wireless connection, insert new batteries and confirm there is a good connection. See
the mouse user manual.
3. If the mouse uses a USB connection, try an alternate USB port.
4. Try an alternative program to verify mouse operation. Reinstall the program experiencing mouse failure.
START
Fan power
wire well
connected?
Connect it wellNo
Fan OK? No
Replace
No
Seat it well
No
Replace
CPU
Replace M/B
CPU
heatsink well
seated?
CPU OK?