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5
Removal and replacement procedures:
Microtower
NOTE:
HP continually improves and changes product parts. For complete and current information on
supported parts for your computer, go to http://partsurfer.hp.com, select your country or region, and then
follow the on-screen instructions.
Adherence to the procedures and precautions described in this chapter is essential for proper service. After
completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all
components operate properly.
NOTE:
Not all features listed in this guide are available on all computers.
Preparation for disassembly
See
Routine care, SATA drive guidelines, and disassembly preparation on page 17
procedures.
1.
Remove/disengage any security devices that prohibit opening the computer.
2.
Remove all removable media, such as compact discs or USB flash drives, from the computer.
3.
Turn off the computer properly through the operating system, then turn off any external devices.
4.
Disconnect the power cord from the power outlet and disconnect any external devices.
CAUTION:
Regardless of the power-on state, voltage is always present on the system board as long as the system
is plugged into an active AC outlet. In some systems the cooling fan is on even when the computer is in
the "Standby," or "Suspend" modes. The power cord should always be disconnected before servicing a
unit.
5.
As applicable, lay the computer down on its side to achieve a safe working position.
NOTE:
screws with the units removed.
CAUTION:
The screws used in the computer are of different thread sizes and lengths; using the wrong
screw in an application may damage the unit.
Turn off the computer before disconnecting any cables.
During disassembly, label each cable as you remove it, noting its position and routing. Keep all
for initial safety
Preparation for disassembly
25
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