MAP 2030: 7031-D24 or 7031-T24 power control

This MAP helps isolate FRUs that are causing a power problem that do not allow the 7031-D24 or 7031-T24 disk subsystem to power off when it should.

You are here because power is still present at the disk subsystem although the host system is switched off.

1. Observe the cards.
   Does the disk subsystem remain powered on for more than 30 seconds after the last connected system powers off?

   NO

   Go to MAP 2410: 7031-D24 or 7031-T24 repair verification to verify the repair.

   YES

   Go to step 2.

2. Disconnect all SCSI cables and wait 30 seconds.

   Is the disk subsystem still powered on?

   NO

   Go to step 3.

   YES

   Suspect an adapter problem in the host system.

3. Remove all SCSI initiator cards.

   Is the disk subsystem still powered on?

   NO

   1. Replug the SCSI interface cards one at a time to determine which one is bad.
   2. If the disk subsystem powers on after replacing a SCSI interface card, replace that SCSI interface card.
   3. Go to MAP 2410: 7031-D24 or 7031-T24 repair verification to verify the repair.

   YES

   Go to step 4.

4. Does the disk subsystem have two power supplies?

   NO

   1. In the sequence shown, exchange the following FRUs for new FRUs:
      1. Power supply assemblies
      2. Frame assembly
   2. Go to step 7.

   YES

   Go to step 5.

5. Do both power supplies have their DC PWR LEDs on?

   NO

   Go to step 6.

   YES

   In the sequence shown, exchange the following FRUs for new FRUs. Ensure that for each FRU exchange, you go to MAP 2410: 7031-D24 or 7031-T24 repair verification to verify the repair.

   1. Power supplies
   2. Frame assembly

6. Does only one power supply have its DC PWR LED on?

   NO

   Go to step 7.

   YES

   1. Exchange, for a new one, the power supply whose DC PWR LED remains illuminated.
   2. Go to step 7.

7. Is the disk subsystem still powered on?

   NO

   The problem is solved.

   YES

   Call for assistance.