Cleaning The Mouse; Service Considerations; Power Supply Fan; Tools And Software Requirements - Compaq Deskpro EN Series Maintenance & Service Manual

4.2.5

Cleaning the Mouse

Before cleaning the mouse, ensure that the power to the computer is turned off.
„
Clean the mouse ball by first removing the retaining plate and the ball from the housing.
Pull out any debris from the ball socket and wipe the ball with a clean dry cloth before
reassembly.
„
To clean the mouse body, follow the procedures in Section 4.2.2.
4.3

Service Considerations

Listed below are some of the considerations that you should keep in mind during the disassembly
and assembly of the computer.
4.3.1

Power Supply Fan

The power supply fan is a variable-speed fan based on the temperature in the power supply.
CAUTION: The cooling fan is off only when the computer is turned off or the power cable has been
disconnected.
The cooling fan is always on in all other instances (when the computer is either "On," or in "Standby" or
"Suspend" mode).
You must disconnect the power cord from the power source before opening the computer to prevent
system board or component damage.
4.3.2

Tools and Software Requirements

To service the computer, you need the following:
„
Torx T-15 screwdriver (Compaq screwdriver with bits P/N 161946-001)
„
Flat-bladed screwdriver
„
Diagnostics software
„
Compaq tamper-resistant T-15 wrench (Smart Cover FailSafe Key, P/N 166527-001)
„
Compaq tamper-resistant bits (Smart Cover FailSafe Key, P/N 166527-002)
4.3.3

Screws

The screws used in the computer are not interchangeable. They may have standard or metric
threads and may be of different lengths. If an incorrect screw is used during the reassembly
process, it can damage the unit. Compaq strongly recommends that all screws removed during
disassembly be kept with the part that was removed, then returned to their proper locations.
As each subassembly is removed from the computer, it should be placed away
from the work area to prevent damage.
Compaq Deskpro EN Series, Small Form Factor and Net PC Models 4-5