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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 8863, 7362," on page 107 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
305-xxx-xxx
Failed video monitor test.
405-xxx-000
Failed Ethernet test on controller on I/O
board.
405-xxx-00n
No good link! Check loopback plug.
Recovering from a BIOS update failure
If the BIOS code in the server has become damaged, such as from a power failure
during an update, your server has an advanced recovery feature that will
automatically switch to a backup BIOS page.
The flash memory of the server consists of a primary page and a backup page. If
the BIOS code in the primary page is damaged, the onboard baseboard
management controller will detect the error and automatically switch to the backup
page to start the server. In this event, a POST warning message "Booted from
backup POST/BIOS image" will be displayed.
Note: The backup page version may not be the same version as the primary
image.
You can then recover or restore the original primary page BIOS by using the BIOS
flash diskette.
Note: To create and use a diskette, you must add an optional external diskette
drive to the server.
To recover the BIOS code and restore the server operation to the primary bank,
complete the following steps:
1. Download the latest version of the BIOS code from http://www.ibm.com/support/.
2. Update the BIOS code, following the instructions that come with the update file
88
IBM System x3850 Type 8863, 7362: Problem Determination and Service Guide
that you downloaded. This will automatically restore/update the primary page.
Action
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.
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.
1. Make sure that the loopback plug is a gigabit
loopback plug (see "Solving Ethernet controller
problems" on page 103).
2. Check for any loose connections between the
loopback plug and the Ethernet connector.
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