Power Checkout - IBM 6000R - Netfinity - 8682 Hardware Maintenance Manual

Table 1. Light path diagnostics
LED on
PS3
Fan
DASD
NMI
SP
Event Log
Non Red
Over Spec
Temp

Power checkout

Power problems can be difficult to troubleshoot. For
instance, a short circuit can exist anywhere on any of the
power distribution busses. Usually a short circuit will cause
the power subsystem to shut down because of an overcur-
rent condition.
A general procedure for troubleshooting power problems is
as follows:
1. Power off the system and disconnect the AC cord(s).
2. Check for loose cables in the power subsystem. Also
check for short circuits, for instance if there is a loose
screw causing a short circuit on a circuit board.
3. Remove adapters and disconnect the cables and
power connectors to all internal and external devices
until system is at minimum configuration required for
The third power supply has failed. (See
"Diagnostic panel error LEDs" on page 157.)
One of the fan assemblies has failed or is
operating too slowly.
Note: A failing fan can also cause the TEMP
and/or DASD LEDs to be on.
(See "Diagnostic panel error LEDs" on page
157.)
A hot-swap hard disk drive has failed on
SCSI channel B. (See "Diagnostic panel
error LEDs" on page 157.)
A nonmaskable interrupt occurred. (The
PCIA, PCIB, PCIC, or Memory LED will
probably also be on.)
Note: The NMI LED can only be reset by
comletely removing power from
system.
(See "Diagnostic panel error LEDs" on page
157.)
The service processor has failed. (See
"Diagnostic panel error LEDs" on page 157.)
Not implemented at this time.
System is operating in non-redundant power
mode. (See "Diagnostic panel error LEDs"
on page 157.)
The server is drawing more power than the
power supplies are rated for. (See
"Diagnostic panel error LEDs" on page 157.)
The system temperature has exceeded the
maximum rating. (See "Diagnostic panel
error LEDs" on page 157.)
Cause
Diagnostics
23