IBM x3800 - System - 8865, 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, System x3800 Type 8865,” 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 Action
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 102).
2. Check for any loose connections between the
loopback plug and the Ethernet connector.
Real Time Diagnostics
Real Time Diagnostics can help you diagnose problems in 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.
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 baseboard management
controller will detect the error and automatically switch to the backup page to start
the server. If this happens, a POST message Booted from backup POST/BIOS image
is displayed. The backup page version might not be the same version as the
primary page version.
You can then recover or restore the original primary page BIOS by using a BIOS
flash diskette.
To recover the BIOS code and restore the server operation to the primary page,
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
that you downloaded. This will automatically restore and update the primary
page.
3. Restart the server.
If that procedure fails, the server might not restart correctly or might not display
video. To manually restore the BIOS code, complete the following steps:
1. Read the safety information that begins on page vii and “Handling
static-sensitive devices” on page 117.
2. Turn off the server and peripheral devices and disconnect all external cables
and power cords; then, remove the cover.
Chapter 2. Diagnostics
89