IBM 6151 Maintenance And Service Manual page 393

POST Error 23 PIC 9840
Use this PIC to analyze the 984 SRA number.
Step 1
1.
Remove the top cover. If needed, see Section 4.
2. Remove the adapters from slots 1 through 5 and record the type
and slot position of each.
3. Plug the external power cable into the outlet.
4. Set the power switch on the system unit to On.
5. Wait 2 minutes; then answer the following question.
A.rZBHil
IS "23" DISPLAYED IN THE TWO-DIGIT DISPLAY?
NO Go to "Step 3" on page 3-9840-3.
YES Continue on the next page.
(6/88) Problem Isolation Charts 3-9840-1