IBM 3270 Maintenance Manual page 145

2. Rerun the diagnostics (see page 3-200-55).
If you receive the same error code, *
replace another nine modules from a
different bank and run the diagnostics
again (see page 3-200-55). Repeat this
process until either the problem* is solved
or all the modules on the failing adapter
have been replaced.
If you receive the same error code* after
all four banks have been changed:
a. Replace the 64/256KB Memory
Expansion Option Adapter.
b. Remove all the 64K modules from the
failing adapter and install them on the
new adapter. See Section 5,
"Removal/Replacement and
Adjustments. "
c. Rerun the diagnostics (see page
3-200-55).
*
Note:
If you receive a new error code at any
time during the above procedure go to page
3~200-1
and follow the PIC again.
3-200-20 Maintenance Information