Power-Supply Leds - IBM TotalStorage 201 User Reference Manual

Table 3. Power-supply LEDS
AC Good DC Good
LED LED
Off Off
On Off
On On
Description FRU/action
No power to system
1. Check AC power to system.
or AC problem.
2. Power supply
Standby mode or DC
1. Check system board cable
problem.
2. Remove the adapters and
3. Power supply
4. Power backplane
5. System board
Power is OK. N/A
connectors J32, J33, and J35.
Move jumper on J32's extension
cable to pins 2-3 to bypass
power control. If the DC Good
LED comes on, press
Ctrl+Alt+Delete. Watch the
screen for any POST errors.
Check the System Event/Error
Log for any listed problems. If
the system powers up with no
errors:
a. Power switch assembly
b. System board
disconnect the cables and power
connectors to all internal and
external devices. Power-on the
system. If the DC Good LED
comes on, replace the adapters
and devices one at a time until
you isolate the problem.
Chapter 7. Troubleshooting
49