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15. Restart the server. The system should start up normally.
Updating the UUID
The Universal Unique Identifier (UUID) must be updated when the system board is
replaced. Complete the following steps to update the UUID:
1. Copy the UUID utility ("uuid.exe") from the BIOS flash diskette to a DOS
2. Insert the diskette created in step 1 into the server.
3. Restart the server from the diskette.
4. At the "A:" prompt, type UUID /wr; then, press Enter. The utility will generate a
5. Restart the server.
Updating the DMI/SMBIOS data
The Desktop Management Interface (DMI) must be updated when the system board
is replaced. Complete the following steps to update the DMI:
1. Copy the DMI/SMBIOS utility ("extrmdmi.exe") from the BIOS flash diskette to a
2. Insert the diskette created in step 1 into the server.
3. Restart the server from the diskette.
4. At the "A:" prompt, type extrmdmi.exe; then, press Enter.
5. To change the machine type and model number, type
6. To change the serial number, type
7. To change the asset tag, type
8. Restart the server.
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
3. Remove adapters and disconnect the cables and power connectors to all
26
xSeries 305 Type 8673: Hardware Maintenance Manual and Troubleshooting Guide
bootable diskette.
random identifier.
DOS bootable diskette.
mtm XXXXYYY
where XXXX is the model type and YYY is the model number; then, press Enter.
sn ZZZZZZZ
where ZZZZZZZ is the serial number; then, press Enter.
asset AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
where AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA is the asset tag number; then, press
Enter.
example, if there is a loose screw causing a short circuit on a circuit board.
internal and external devices until the server is at the minimum configuration
required to start the server (see "Minimum operating requirements" on page 77).
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