IBM 7012 300 Series Installation And Service Manual page 56

Step 12
(from Step 11)
The system is working correctly with this configuration. One of the FRUs (adapters) that you
removed is probably defective.
1. Set the power switch on the system unit to Off.
2. Install a FRU (adapter) and connect any cables and devices that were attached to it.
3. Insert the first diagnostic diskette into the diskette drive.
4. Set the power switch on the system unit to On.
5. Wait for one of the following conditions to occur:
Is the DIAGNOSTIC OPERATING INSTRUCTIONS screen displayed or is c31
displayed in the three-digit display?
NO
YES
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Installation and Service Guide
The DIAGNOSTIC OPERATING INSTRUCTIONS screen is displayed.
The system stops and c31 is displayed in the three-digit display.
The 3.5-inch diskette drive in-use light is on and c07 is displayed in the three-digit
display. Insert the next diagnostic diskette. Continue this substep until all diskettes are
loaded or c31 is displayed in the three-digit display.
The system stops for at least three minutes and a constant number, character, or
symbol other than c31 is displayed in the three-digit display and the power light is on.
The system stops and two or more numbers with values between 221 and 296 are
displayed alternately in the three-digit display.
The system stops and a flashing 888 is displayed in the three-digit display.
The power light does not come on, or the power light comes on but does not stay on.
Go to Step 13.
Repeat this step until all of the FRUs (adapters) are installed.
Go to "Map 0410: Repair Checkout" in the POWERstation and
POWERserver Common Diagnostics and Service Guide.