IBM RS/6000 7025 F50 Series, Service Manual, Page: 94 / 362

Table 3-1 (Page 21 of 24). Firmware Error Codes.
Error Code Description Action / Possible Failing FRU
40B00102 Surveillance timeout on CPU 3. 1. Check for errors or unusual
conditions that might prevent the
CPU from reporting Heartbeat
messages; such as system dump,
machine check or checkstop error.
Review the Service Processor error
log.
2. Replace the CPU card.
40B00103 Surveillance timeout on CPU 4. 1. Check for errors or unusual
conditions that might prevent the
CPU from reporting Heartbeat
messages; such as system dump,
machine check or checkstop error.
Review the Service Processor error
log.
2. Replace the CPU card.
40D00003 An unknown slow shutdown
commanded. Critical cooling problem. Check to
ensure the the temperature is in the
ambient range
40D00004 An unknown fast shutdown
commanded. Locked fan failure detected. Make sure
all fans are operating normally.
4B200054 The CPU cards are not compatible with
each other (i.e. one is a 166MHz and
the other is a 332MHz) 1. Remove cards
2. Verify part numbers
3. Install valid cards
4B200055 No CPU card in first slot. 1. If only one processor card is used,
it must be in slot #1.
2. If two processor cards are being
used, replace the card in slot #1.
4B201000 Checkstop 1. Attempt to reboot the system in
Service Mode, this preserves the
AIX error log. If the reboot fails,
attempt to reboot from the
CD-ROM. If the reboot is
successful, run Diagnostics in
Problem Determination mode to
determine the cause of the failure.
Otherwise continue.
2. CPU Card.
3. System Board.
4. PCI Adapter.
5. I/O board. (See notes on 3-1.)
3-22
Service Guide