Firmware Checkpoints - IBM RS/6000 Enterprise Server M80 Service Manual

Firmware Checkpoints

System firmware uses checkpoints (progress codes) in the range of Exxx to EFFF. These checkpoints
occur during system startup and can be useful in diagnosing certain problems. Service processor
checkpoints are listed in "Service Processor Checkpoints" on page 138.
Attention: If you replace FRUs or perform an action and the problem is still not corrected, go to "MAP
1540: Minimum Configuration" on page 110 unless otherwise indicated in the tables.
If you replace FRUs or perform an action and the problem is corrected, go to "MAP 0410: Repair
Checkout" in the RS/6000 and Eserver pSeries Diagnostic Information for Multiple Bus Systems.
Note:
Firmware can hang due to multiple causes. In many cases, it can be caused by the primary
processor or a memory problem in the first 64 MB of real memory. If a location code is not provided
with the checkpoint, the following procedure will use the primary processor and low memory as the
probable FRUs.
1. If firmware is hung (E100 through EFFF) and a location code is displayed on the second line of
the operator panel, use that location code as the primary FRU.
2. If no location code is present or if replacing the primary FRU indicated in the location code did
not fix the problem, then perform the following actions:
a. Power off the system and go to the service processor menus.
b. From the service processor main menu, select option 3, System Information Menu, then
select option 5, Read NVRAM.
c. Enter 330 when prompted for an address.
d. Look at the byte of data at address 330. If the value is FF, go to note 3. If the value is
00-0F, replace the processor card, location: U1.1-P1-C1. Attempt to reboot the system. If the
system hangs at the same checkpoint, go to 3. If the system hangs at a new checkpoint,
perform the actions associated with the new checkpoint.
3. Power off the system. From the service processor main menu, select option 3, System
Information Menu, then option 8, Memory Configuration/Deconfiguration Menu. Identify the
first configured memory riser card and octal of DIMMs. Replace the first octal of DIMMs.
4. If replacing the first octal of configured DIMMs does not fix the problem, replace the memory
riser card. If the problem is still not fixed, go to "MAP 1540: Minimum Configuration" on page
110
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Service Guide