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Note: See Chapter 7, "Parts listing, Types 8861, 8862," on page 139 to determine which components are
replaceable by the customer and which components must be replaced by an IBM field service technician.
Power supply LEDs
AC
DC
good
good
Fan
Off
Off
Off
On
Off
Off
On
On
Off
On
On
Off
On
On
On
On
On
Off
Operator
information
panel LED
Description
Off
No power to system
or ac problem.
Off
DC source power
problem
Off
Standby power
problem
Blinking
System power-on
problem
On
Power supply fan
fault
On
Power is OK.
FRU/action
1. Check ac power to system.
2. Make sure power cord is plugged in to a
functioning power source.
3. Isolate by removing one power supply at a time.
1. Make sure memory cassette is seated in
microprocessor tray assembly and that
microprocessor tray assembly is connected
to power backplane.
2. Isolate by removing one power supply at a time.
3. View service processor error logs through serial
connection of remote supervisor adapter.
1. View service processor error logs through
serial connection of remote supervisor
adapter.
2. If no 3.3vsby, replace power backplane.
3. If no 5vco, isolate by removing one power supply
at a time.
1. View service processor error logs through
serial connection of remote supervisor
adapter.
2. Press power button on operator information
panel.
3. Use force power-on jumper as debug aid (see
"Microprocessor board connectors, jumpers and
LEDs" on page 68) to eliminate operator
information panel switch and cable.
4. Remove service processor and attempt to turn on
the server.
v Replace power supply.
N/A
Chapter 6. Symptom-to-FRU index
131
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