IBM RS/6000 H50, Installation And Service Manual

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Table 3-1 (Page 25 of 26). Firmware Error Codes.
Error Code Description Action / Possible Failing FRU
4B2xxx02 Checkstop - Slot 2 Fail 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 suc-
cessful, run Diagnostics in Problem
Determination mode to determine
the cause of the failure. Otherwise
continue.
2. System Board.
3. I/O board. (See notes on 3-1.)
4. CPU Card in Slot 2.
4B2xxx41 ABIST fail. CPU Card in Slot 1.
4B2xxx42 ABIST fail. CPU Card in Slot 2.
4B2xxx43 Service Processor reports JTAG fail. 1. Service Processor (SP) is the least
likely failure, but it is the tester in
this case. Replace the SP to
assure true failure indication. If the
failure disappears, the SP was bad.
Otherwise, reinstall the old SP.
2. Remove the CPU(s) and the
System Board. If the failure
returns, replace the I/O planar.
(See notes on 3-1.) Otherwise,
continue.
3. Install the System Board WITHOUT
the CPU(s). If the failure returns,
replace the System Board. Other-
wise, continue.
4. Install the CPU Card in slot 1. If
the failure returns, replace that
CPU Card. Otherwise, continue.
5. Install the CPU Card in slot 2 (if
there was one). If the failure
returns, replace that CPU Card.
Otherwise, continue.
6. If the failure is still absent, the
problem was a bad connection,
and you have reseated the pos-
sible connections.
4BA00000 The system support controller detects
the service processor, but cannot
establish communication. The system
halts. 1. Replace the service processor.
2. Replace the I/O board.
3-26
RS/6000 Enterprise Server Model H50 Installation and Service Guide