IBM 6151 Maintenance And Service Manual page 395

Step 3
One of the removed adapters is failing.
1.
Set the power switch on the system unit to Off.
2. Install one of the adapters beginning with the display adapter.
3. If the adapter has a device attached to it, set the power switch
on the device to On.
4. Insert the RT PC Diagnostics 1 diskette in the diskette drive
and close the drive.
5. Be sure the power has been off 30 seconds; then set the power
switch on the system unit to On.
6. Wait 4 minutes; then answer the following question.
ARE THE "DIAGNOSTIC OPERATING INSTRUCTIONS"
DISPLAYED?
YES
Repeat the above steps.
NO
Continue on the next page.
(6{88) Problem Isolation Charts 3-9840-3