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v Yes: There was a failed attempt to call the SRC function instruction start or
instruction stop. This may be caused by a code problem. Load AJDGP01
from RETAIN. IPL the system. If the problem is not corrected, contact your
next level of support.
v No: Continue with the next step.
4. Choose one of the following:
v If you are working on a system Model 270 or 820, then continue with the
next step.
v If you are working on a system Model 830, 840, SB2, or SB3, then go to step
6 of this procedure.
5. Is the reference code B4FF 00B0 or B4FF 00B1?
v No: Contact your next level of support.
This ends the procedure.
v Yes: If the reference code is B4FF00B1, then the System Unit Backplane may
be the failing item. If the reference code is B4FF00B0, then the System Unit
Backplane may be the failing item, or the failure may be caused by the
Licensed Internal code. For either reference code, perform the following:
Note: If the reference code B4FF 00B1 occurred after a power outage, try
removing incoming power, reapplying it, and then retrying the IPL.
a. Before exchanging any parts, verify that all connections to the System
Unit Backplane are secure.
b. Exchange the System Unit Backplane in position MB1.
– For Model 270: To determine the location, CCIN, part number, and
removal and installation procedure for the System Unit Backplane,
locate card position MB1 in the FRU Locations and Failing
Components table for the processor feature code of the Model 270 you
are working on. Use Locations -- Model 270 and the processor feature
code to determine which Model 270 locations diagram and FRU
Locations and Failing Components table to use.
– For Model 820: To determine the location of the System Unit
Backplane, see Model 820 locations. To determine the CCIN, part
number, and removal and installation procedure for the System Unit
Backplane, locate card position MB1 and FRU name "System Unit
Backplane" in Model 820.
If this does not fix the problem, contact your next level of support.
This ends the procedure.
6. Is the reference code B4FF 00B0 or B4FF 00B1?
v Yes: Continue with the next step.
v No: Go to step 8 on page 260 of this procedure.
7. If the SRC B4FF 00B1 occurred after a power outage, remove the incoming
power, wait 30 seconds, reapply the power and retry the IPL. If the system IPLs
without the error, the procedure is complete. If the reference code is B4FF00B1,
then the HSL I/O bridge card may be the failing item. If the reference code is
B4FF00B0, then the HSL I/O bridge Card may be the failing item, or the failure
may be caused by the Licensed Internal code. For either reference code,
exchange HSL I/O bridge card in location C08. To determine the CCIN, part
number, and removal and installation procedure, locate card position C08 and
FRU name "HSL I/O bridge card" from the following:
B4FF
259
System Reference Codes
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