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2-1540-16 Installation and Service Guide
Step 14
(from Step 1)
1. Set the power switch on the system unit to Off.
2. Record the slot numbers of the adapters, label and record the location of any cables
attached to the adapters. Remove all the adapters from the system planar except the
display adapter (if installed and the attached display will be the system console).
3. Disconnect any cables that are plugged into connectors S1, S2, P, K, T, and M on the
rear of the system unit.
Note: If a terminal attached to S1 or S2 will be the system console, do not disconnect it.
If a display attached to a display adapter will be the system console, do not disconnect
the keyboard.
4. Insert the first diagnostic diskette into the diskette drive.
5. Set the power switch on the system unit to On.
6. Wait for one of the following conditions to occur:
• The DIAGNOSTIC OPERATING INSTRUCTIONS screen is displayed
• The system stops and c31 is displayed in the three-digit display. Follow the
instructions on the display to select your console 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, c31 is displayed in the three-digit display, or the DIAGNOSTICS OPERATING
INSTRUCTIONS screen is displayed.
• The system stops for at least 3 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.
Is the DIAGNOSTIC OPERATING INSTRUCTIONS screen displayed?
NO The symptom has changed. Check for loose cards, cables, and obvious
problems. If you do not find a problem, return to Step 1 in this MAP and
follow the instructions for the new symptom.
YES Go to Step 15.