IBM 8480 - Eserver xSeries 205, Руководство по техническому обслуживанию и устранению неисправностей

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Recovering from a POST/BIOS update failure
If power to your server is interrupted while POST/BIOS is being updated (flash
update), your server might not restart correctly. If this happens, perform the
following procedure:
1. Turn off the server and all attached devices.
2. Unplug all power cords from electrical outlets and remove the server cover and
the support bracket. See the Option Installation Guide for instructions.
3. Locate the boot block and password check jumpers on the system board,
removing any adapters that impede access to the jumpers. See “System and
PCI extender boards” on page 34 for the location of the boot block and
password check jumpers.
4. Move both jumpers to the adjacent pair of jumper pins.
5. Replace any adapters that were removed and replace the support bracket and
the cover. See the Option Installation Guide for instructions. Reconnect the
power cords for the server and monitor to electrical outlets.
6. Insert the POST/BIOS update (flash) diskette into drive A, and turn on the
server and monitor.
7. After the update session completes, remove the diskette from the diskette
drive, and turn off the server and monitor.
8. Unplug all power cords from electrical outlets, and remove the cover.
9. Remove any adapters that impede access to the boot block and password
check jumpers.
10. Replace the boot block and password check jumpers to their original positions.
11. Replace any adapters that were removed.
12. Replace the cover, and reconnect all cables that were disconnected.
13. Turn on the server to restart the operating system.
Power checkout
Power problems can be difficult to solve. For example, a short circuit can exist
anywhere on any of the power distribution buses. Usually a short circuit will cause
the power subsystem to shut down because of an overcurrent condition.
A general procedure for troubleshooting power problems is as follows:
1. Turn off the server and disconnect all ac power cords.
2. Check for loose cables in the power subsystem. Also check for short circuits, for
example, 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 the server is at the minimum configuration
required to start the server (see “Minimum operating requirements” on page 96).
4. Reconnect all ac power cords and turn on the server. If the server starts up
successfully, replace adapters and devices one at a time until the problem is
isolated. If the server does not start up from the minimal configuration, replace
FRUs of minimal configuration one at a time until the problem is isolated.
To use this method, it is important to know the minimum configuration required for a
system to start (see page 96).
Chapter 3. Diagnostics
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