No AC or DC Power

Table 10-1 AC/DC Power Problems


Indication	Test/Procedure	Reference
No AC Fans are not turning No LEDs	Check incoming AC power.
	Check keyswitch setting.	See "Restarting the System".
	Check AC distribution unit switch	See Figure 11-2.
No DC or yellow LED is lighted	Check system front panel LEDs or clock+ board LEDs.	See Table 9-1.
	Check PCMs.	See Table 9-2, Table 9-3.
	Check peripheral power supply.
	Check CPU/Memory+ boards.
	If clock+ board is faulty, system operation/diagnostics may be erratic.
System error messages	Check LEDs on: --Front panel --Clock+ board --Peripheral power supply --PCMs --CPU/Memory+ boards --I/O+ boards	See Chapter 9, Troubleshooting Overview.