2. Ensure that the SPCN cables that connect the racks are connected and seated
correctly at both ends.
Does the I/O rack power off, and is the power-good LED off (or flashing for all
power supplies in the I/O drawers), for all the power supplies in all the
drawers (the power supply power-good LED can be seen from the rear of the
I/O drawer)?
No Go to step 4 of this procedure.
Yes This ends the procedure. Go to ″Map 0410: Repair Checkout″ in the
Diagnostic Information for Multiple Bus Systems.
3. Refer to “Powering Off and Powering On the System” on page 492 to power off the
system, then return here and answer the following question.
Does the system rack power off, and is the Power On light off?
No Go to step 4 of this procedure.
Yes The system is not responding to normal power-off procedures, which could
indicate a Licensed Internal Code problem.
Ask your next level of support for assistance.
This ends the procedure. Go to ″Map 0410: Repair Checkout″ in the
Diagnostic Information for Multiple Bus Systems.
4. Disconnect the ac power cables.
5. Exchange the following FRUs in the system rack or the I/O rack one at a time (see
“System Rack Removal and Replacement Procedures” on page 493):
If the system rack is failing:
a. Operator panel
b. SPCN card
c. ac module
d. Operator panel cable
If an I/O rack is failing:
a. SPCN system rack to I/O rack cable
b. Service processor card in I/O rack.
c. I/O planar in primary I/O drawer.
This ends the procedure. Go to ″Map 0410: Repair Checkout″ in the Diagnostic
Information for Multiple Bus Systems.
Chapter 3. Maintenance Analysis Procedures 101
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