User`s guide

128 Removal and Replacement
Top Cover (HP-Qualified Only)
The following procedure is for HP-qualified personnel only.
Remove and replace the top cover (not a replaceable part) in order to replace the
power switch assembly, light pipes, or the midplane.
You will need to turn the power off to perform this procedure.
Tools
■ Small flat-blade screwdriver
■ Torx T25 screwdriver
■ Torx T10 screwdriver
Procedure
Caution Disk slots must be empty before removing the top cover.
1 Remove disk modules and fillers and place them on an appropriate anti-static
surface. See page 110.
2 Disconnect all power and SCSI cables.
3 Remove the power supply/fan modules. See page 123.
4 Remove the disk system retention screws. See page 126.
5 Remove the disk system from the rack and place it on an appropriate anti-
static surface. See page 125.
Caution Removing the top cover with the power switch in the ON (in)
position can damage the internal switch.
6 Remove the three flathead screws from the top of the top cover (A in
Figure 59).
7 Rotate the cover upward; then lift it away from the disk system.