IBM H Series Installation And Service Manual page 145

Table 3-1 (Page 36 of 40). Firmware Error Codes.
Error Code Description
4B2xxx43 Service Processor reports JTAG fail
4B2xxx51 LBIST fail
4B2xxx52 LBIST fail
Action / Possible Failing FRU
For Model H50:
1. Service Processor is the least likely
failure, but it is the tester in this case.
Replace the service processor to
assure true failure indication. If the
failure disappears, the service
processor was bad. Otherwise,
reinstall the old service processor.
2. Remove the CPU(s) and the system
board. If the failure returns, replace
the I/O board. (See notes on 3-1.)
Otherwise, continue.
3. Install the system board WITHOUT the
CPU(s). If the failure returns, replace
the system board. Otherwise, con-
tinue.
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 possible connections.
For Model H70:
1. Remove processor card in slot 2 (if
installed) and see if the problem is
resolved. If not, continue.
2. Exchange processor card in slot 1 with
processor card removed from slot 2 in
step 1 (replace processor card if only
one processor card is installed) and
see if the problem is resolved. If not,
continue.
3. Replace the system board.
4. I/O board. (See notes on 3-1.)
1. CPU Card in processor card connector
1.
2. I/O board. (See notes on 3-1.)
1. CPU Card in processor card connector
2.
2. I/O board. (See notes on 3-1.)
Chapter 3. Error Code to FRU Index
3-37