Opening The Top Cover - HP Visualize J5000 - Workstation Owner's Manual

Changing Your Computer's Hardware Configuration
Opening the System Unit

Opening the Top Cover

To open the top cover of the unit—to install or remove a
removable-media drive (i.e., a CD drive, a DDS tape drive, or a floppy
drive), DIMMs, or I/O cards, for example, or for other access to the inside
of the unit—follow these steps:
1. Shut down and unplug the system as described in "Opening the
System Unit" on page 43.
2. Remove the two thumbscrews in the top corners of the back panel.
The upper-left one (when looking at the back of the unit) has a
power-supply interlock, and removing the screw disengages the
power to the unit, reducing shock hazard during the configuration
process. Note that cutting off power via the power-supply interlock
does not do a clean shutdown like pressing the power switch does.
Figure 2-3 Removing the Thumbscrews
Thumbscrew
(with power-supply
interlock)
3. Slide the top panel an inch or two toward the rear of the machine, and
then remove it by lifting straight up. The top panel fits snugly, so you
may have to get a firm grip on it in order to slide it back.
46
Thumbscrew
Chapter 2