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.
Error code Description Action
301-xxx-000 Failed keyboard test.
Note: After installing a USB keyboard, you
might have to use the Configuration/Setup
Utility program to enable keyboardless
operation and prevent the POST error
message 301 from being displayed during
startup.
1. Reseat the following components:
a. Keyboard
b. I/O board
2. Replace the components listed in step 1 one at a
time, in the order shown, restarting the server
each time.
302-xxx-xxx Failed mouse test.
1. Reseat the following components:
a. Mouse
b. I/O board
2. Replace the components listed in step 1 one at a
time, in the order shown, restarting the server
each time.
305-xxx-xxx Failed video monitor test.
1. Reseat the following components:
a. Monitor
b. I/O board
2. Replace the components listed in step 1 one at a
time, in the order shown, restarting the server
each time.
405-xxx-000 Failed Ethernet test on controller on I/O
board.
1. Make sure that Ethernet is not disabled in the
Configuration/Setup Utility program and that the
BIOS code is at the latest level.
2. Run the loopback diagnostic.
3. Reseat the I/O board.
4. Replace the I/O board.
405-xxx-00n No good link! Check loopback plug.
1. Make sure that the loopback plug is a gigabit
loopback plug (see “Solving Ethernet controller
problems” on page 105).
2. Check for any loose connections between the
loopback plug and the Ethernet connector.
Real Time Diagnostics
Real Time Diagnostics can help you diagnose certain devices while the operating
system is running, to prevent and minimize server downtime.
For more information and to download Real Time Diagnostics, go to:
http://www-1.ibm.com/support/docview.wss?uid=psg1MIGR-50681.
Recovering from a BIOS update failure
The server has an advanced recovery feature that will automatically switch to a
backup BIOS page if the BIOS code in the server has become damaged, such as
from a power failure during an update.
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IBM System x3950 Type 8878 and System x3950 E Type 8879: Problem Determination and Service Guide