IBM 6151 Maintenance And Service Manual page 191

Step 14
Run the diagnostic checkout that fails. The TEST OPTION and
the DIAGNOSTIC TEST LIST menu may display if the
configuration was changed. Follow the instructions as they
display.
DID THE "THERE IS A HARDWARE PROBLEM IN YOUR
MACHINE" SCREEN DISPLAY?
NO One of the options, adapters, or a device that you
disconnected is failing.
Using the list below, install and attach the options,
adapters, and devices one at a time to isolate the failure.
(You may want to install or attach more than one at a time;
then isolate to one.) Test each option, adapter, or device by
running the failing diagnostic checkout. The TEST
OPTION and the DIAGNOSTIC TEST LIST menu may
display if the configuration was changed. Follow the
instructions as they display.
When the "THERE IS A HARDWARE PROBLEM IN
YOUR MACHINE" screen displays, go to "Step 27" on
page 3-0060-29.
Install and connect the options, adapters and devices in the
following order:
1.
Options
2. Adapters (Do not connect the devices yet)
3. Fixed-disk drives
4. Diskette drives
5. Attach the devices.
YES Continue on the next page.
(6/88) Problem Isolation Charts 3-0060-Hi