Replace A Failed Midplane; Removing/Installing An Esm Fru - IBM F10 Service Manual

Figure 88. Removing/Installing an ESM FRU
10. Install the new ESM FRU (Figure 88).
11. Re-connect the SCSI cables (Figure 87 on page 172).
12. Turn on the power and check the system status.
13. If applicable, replace the panels (or close the doors) on the front and back of

Replace a Failed MidPlane

Problem Indicators
There may be a problem with the mid-plane if one or more of the following occur:
v Intermittent faults occur or all LEDs unlit on the drive module FRUs
v Intermittent or no I/O activity is reaching the drive module drives
v Software reports I/O related errors
Set the new ESM FRU into the empty slot, slide it all the way into the drive
module and lock both handles in place.
Make sure that all the cables are plugged in securely in their original locations.
Attention: Connecting the cables incorrectly could cause data loss.
Turn on both power switches and check the LEDs on the drive module. The
green LEDs should be on and the amber LEDs should be off.
If an amber LED turned on, go to "Drive Module Troubleshooting Chart" on
page 198 for instructions. If the amber LEDs remain off, but you still have
problems with the SCSI bus transmissions to and from the disk array, it may
indicate a failed mid-plane (see "Replace a Failed MidPlane").
the cabinet.
Chapter 11. Servicing the SCSI Components
173