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Compaq Prosignia Desktop 340 Series Computer 4–1
4
Removal and Replacement Procedures
After completing all necessary removal and replacement procedures, run the Diagnostics utility
to verify that all components operate properly.
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CAUTION: When the computer is plugged into an AC power source, there is always voltage applied to
the system board. You must disconnect the power cord from the power source before opening the
computer to prevent system board or component damage.
4.1 Preparation for Disassembly
See Chapter 3, “Removal and Replacement Preliminaries and Routine Care,” for initial
procedures.
To prepare the computer for disassembly:
1. Remove any diskette or compact disc from the computer.
2. Unlock the computer Smart Cover Lock using Computer Setup.
Turn off the computer and any peripheral devices that are connected to it.
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CAUTION: Turn off the computer before disconnecting any cables.
Ä
CAUTION: When the computer is plugged into an AC power source, there is always voltage applied to
the system board. You must disconnect the power cord from the power source before opening the
computer to prevent system board or component damage.
3. Disconnect the power cord from the electrical outlet and then from the computer.
4. Disconnect all peripheral device cables from the computer.
✎
During disassembly, label each cable as you remove it, noting its position and routing. Keep all
screws with the units removed.
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CAUTION: The screws used in the computer are of different thread sizes and lengths; using
the wrong screw in a component may damage the unit.