IBM 6341 - Manual (Page 79)

Power Supply Errors
If the power-on indicator is not on, the power supply fan is not running, or the
computer will not power-off, use the following procedures.
Check/Verify FRU/Action
Check the following for proper installation.
v Power Cord
v On/Off Switch connector
v On/Off Switch Power Supply connector
v System Board Power Supply connectors
v Microprocessor(s) connection Reseat
Check the power-on switch for continuity. Power Cord
Check the power-on switch for continuity. Power-on Switch
Chapter 6. Symptom-to-FRU Index 71