IBM System x3950, Problem Determination And Service Manual

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v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v
See Chapter 3, “Parts listing, Type 8878 and 8879,” on page 109 to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
System-error log message Action
OS Watchdog Triggered
1. Reconfigure the O/S watchdog timer to be a higher value.
2. Reinstall the Remote Supervisor Adapter II SlimLine device
driver for the operating system.
3. Disable the O/S watchdog.
4. Check the integrity of the installed operating system.
5. Reinstall the operating system with applicable device drivers.
PCI-X Card Power Good Fault
1. Reseat the Remote Supervisor Adapter II SlimLine, if one is
present.
2. Reseat the I/O board.
3. Replace the I/O board.
4. (Trained service technician only) Replace the PCI-X board.
POST Watchdog Triggered
1. Reconfigure the POST watchdog timer to be a higher value
(consistent with the time it takes to complete POST).
2. Disable the POST watchdog.
Power Good Fault detected by memory card
%d.
1. Reseat the memory cards.
2. Reseat the DIMMs.
3. Reseat the microprocessor tray.
4. (Trained service technician only) Replace the power backplane.
5. (Trained service technician only) Replace the microprocessor
tray.
Power Supply %d Temperature Warning
1. Make sure that the power supply fans have good airflow and
are not obstructed.
2. Make sure the room temperature is within the recommended
range (see “Environment” at “Features and specifications” on
page 3).
3. Replace the power supply.
Power supply current exceeded max spec value
1. Install another power supply (if possible) and make sure that ac
power cords are correctly connected.
2. Remove devices that consume an extraordinary amount of
power.
3. Replace the power backplane.
Power Supply X 12V Over Current Fault
1. Reseat the following components:
a. Power supply
b. Power backplane
2. Replace the following components one at a time, in the order
shown, restarting the server each time:
a. Power supply
b. (Trained service technician only) Power backplane
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IBM System x3950 Type 8878 and System x3950 E Type 8879: Problem Determination and Service Guide