IBM H Series Installation And Service Manual page 238

System Firmware Recovery
If a troubleshooting procedure has indicated that the firmware information in your
system unit has been corrupted, then you must perform a firmware recovery.
To perform a firmware recovery, do the following:
1. Locate your firmware update diskette
2. Using another system unit, rename the *.img file on the firmware update diskette
to precover.img
3. Make sure your system unit is turned off
4. Insert the firmware recovery diskette into your system unit
5. Turn on your system unit
6. When the keyboard indicator appears, press the 1 key if the system console is
an ASCII terminal, or the F1 key if the system console is a directly-attached key-
board
7. When the System Management Services appear, choose Utilities and perform a
Firmware Update as described above
Service Processor Firmware Updates
See "Service Processor Firmware Updates" on page C-37 for details about updating
the service processor.
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RS/6000 Enterprise Server Model H Series Installation and Service Guide