User`s guide

126 Removal and Replacement
Midplane (HP-Qualified Only)
The midplane board is replaceable by HP-qualified personnel only.
Replace the midplane based on troubleshooting results (see “Isolating Causes” in
chapter 4). Disks, LCCs, and power supply/fan modules connect to the midplane.
The power must be OFF and the top cover removed in order to remove and
replace the midplane board.
Caution Turning off a disk system isolates the enclosed disks from the host.
Perform recommended system administration to prevent loss of
pending I/Os to the disks.
Tools
■ Small flat-blade screwdriver
■ Torx T25 screwdriver
■ Torx T15 screwdriver
■ Torx T10 screwdriver
■ ESD strap
Procedure
1 Remove the top cover. See page 124.
2 Put on your ESD strap and attach the free end to the disk system.
Caution Static discharge can destroy functional components on the
midplane.
3 To remove the midplane:
a Loosen the cam handle locking screws and pull power supplies free of the
midplane (see page 120).
b Loosen the cam handle locking screws and pull the LCCs free of the
midplane.
c Remove the disk modules from the chassis.
d Remove the light pipes (see Figure 63 on page 128).
e Remove the power switch extender arm.