Sun Microsystems 6.0005E+11 manual No AC or DC Power, Indication TEST/PROCEDURE Reference

10

10.1 No AC or DC Power

Begin INDICATION TEST/PROCEDURE REFERENCE

No AC,

fans aren’t turning, no LEDs

No DC

or yellow LED is lit

System error messages

Check incoming AC power.

Check AC circuit breaker on the AC sequencer.

Check keyswitch setting.

Check position of the Local/Remote switch (cabinet server only).

Check system LEDs (front panel or clock board).

Check modular power supplies. Check peripheral power supply. Check CPU/Memory boards.

Check clock board. Operation may be erratic.

See Section 12.3, “Restarting the

System.”

See Figure 12-2 (cabinet).

See Figure 12-1 (cabinet)

or Figure 12-3 (standalone).

See Figure 12-2 (cabinet)

or Figure 12-4 (standalone).

See Table 9-1.

See Table 9-3.

Check LEDs on:	See Chapter 7, “Power Supplies.”
Front panel or clock board
Peripheral PS module
Modular PS modules
CPU/Memory boards
I/O boards
Check /var/adm/messages

End

Figure 10-1Diagnosing AC/DC Power Problems

10-2 Ultra Enterprise 6000/5000/4000 Systems Manual—November 1996