MAP 2022: 7031-D24 or 7031-T24 Power-on

This MAP helps you to isolate FRUs that are causing a power problem on a 7031-D24 or 7031-T24 disk subsystem.

Attention: Do not remove power from the host system or the disk subsystem unless you are directed to in the following procedures. Power cables and external SCSI cables that connect the disk subsystem to the host system can be disconnected while that system is running.

In this step you remove most of the FRUs from the 7031-D24 or 7031-T24 disk subsystem.
1. Remove both power supply assemblies, if two are present.
2. Remove the fan assemblies.
3. Remove the SCSI interface card assemblies. If your disk subsystem has only one SCSI interface card assembly, you do not need to remove the dummy assembly.
4. Disconnect all the disk drive modules from the backplane.
  Note: You do not need to completely remove the disk drive modules.
5. Go to step 2.
Do the following procedure to check the disk subsystem as you reinstall parts.
1. Reinstall a power supply into position 1.
2. Reinstall the fan assemblies.
3. Connect a power cable to the power supply.
4. Set the DC On/Off switch of the power supply to On.
5. Reinstall one SCSI interface card and connect the appropriate cables to a powered-on system.
  Note: Unless a procedure needs you to switch off the disk subsystem, leave it switched on for the remainder of this MAP.
Does the disk subsystem emit smoke or is there a burning smell?
NO

Go to step 3.

YES
1. 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.
  Power supply that you just reinstalled
  
  Fan assemblies
  
  SCSI interface card
  
  Frame assembly
2. Go to step 3.
Reinstall the other power supply into position 2.
1. Connect a power cable to the power supply.
2. Set the DC On/Off switch of the power supply assembly to On.
  Note: Unless a procedure needs you to switch off the disk subsystem, leave it switched on for the remainder of this MAP.
Does the disk subsystem emit smoke or is there a burning smell?
NO

Go to step 4.

YES

Replace the power supplys.
Reinstall a SCSI interface card assembly into position 1.
Does the disk subsystem emit smoke or is there a burning smell?
NO

If the disk subsystem has 2, 3, or 4 SCSI interface cards, go to step 5. Otherwise, go to step 6.

YES
1. Exchange, for a new one, the SCSI interface card assembly that you have just reinstalled.
2. If the disk subsystem has two SCSI interface cards, go to step 5. Otherwise, go to step 6.
Reinstall the other SCSI interface card assembly into position 2.
Does the disk subsystem emit smoke or is there a burning smell?
NO

Go to step6.

YES
1. Exchange, for a new one, the SCSI interface card assembly that you just reinstalled.
2. Go to step 6.
Reconnect a disk drive.
Note: To engage the disk drive you must close its handle.
Does the disk subsystem emit smoke or is there a burning smell?
NO

Go to step 7.

YES
1. Exchange, for a new one, the disk drive module that you just reconnected.
2. Go to step 7.
Reconnect the next disk drive module.
Note: To engage the disk drive you must close its handle.
Does the disk subsystem emit smoke or is there a burning smell?
NO

Go to step 8.

YES
1. Exchange, for a new one, the disk drive module that you just reconnected.
2. Go to step 8.
Have you reconnected all the disk drive modules?
NO

Return to step 7.

YES

Go to step 9.
Have you solved the problem?
NO

Remove all power from the disk subsystem, and call for assistance.

YES

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