IBM 7012 300 Series Installation And Service Manual page 41

Step 21
(from Step 20)
1. Set the power switch on the system unit to Off.
2. Disconnect the three-digit display connector P23 from the system planar.
3. Set the power switch on the system unit to On. Wait 10 seconds before answering the
following question.
Did the power-on light come on and stay on?
NO
YES
Step 22
(from Step 21)
1. Set the power switch on the system unit to Off.
2. Record the locations of all external cables; then disconnect the cables that are plugged
into connectors S1, S2, P, K, T, and M on the rear of the system unit.
3. Set the power switch on the system unit to On. Wait 10 seconds before answering the
following question.
Did the power-on light come on and stay on?
NO
YES
Step 23
(from Step 22)
1. Set the power switch on the system unit to Off.
2. Disconnect connector P16 from the system planar.
3. Set the power switch on the system unit to On. Wait 10 seconds before answering the
following question.
Did the power-on light come on and stay on?
NO
YES
Go to Step 22.
Exchange the three-digit display. Go to "Map 0410: Repair Checkout" in the
Diagnostic Information For Micro Channel Bus Systems .
For Models 340, 34H, 350, 355, 360/36T, 365, 370/37T, and 375, 380, 390,
39H, and 397 go to Step 23.
For Models 320, 32E, and 32H, exchange the system planar. Go to "Map
0410: Repair Checkout" in the Diagnostic Information For Micro Channel
Bus Systems .
Go to Step 24.
Exchange the system planar. Go to "Map 0410: Repair Checkout" in the
Diagnostic Information For Micro Channel Bus Systems .
Exchange the serial port flex cable. Go to "Map 0410: Repair Checkout" in
the Diagnostic Information For Micro Channel Bus Systems .
Maintenance Analysis Procedures (MAPs)
2-1520-11