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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.
NOTE: As each subassembly is removed from the computer, it should be placed away from the work
area to prevent damage.
Cables and Connectors
Most cables used throughout the unit are flat, flexible cables. These cables must be handled with
care to avoid damage. Apply only the tension required to seat or unseat the cables during
insertion or removal from the connector. Handle cables by the connector whenever possible. In
all cases, avoid bending or twisting the cables, and ensure that the cables are routed in such a
way that they cannot be caught or snagged by parts being removed or replaced.
Hard Drives
Handle hard drives as delicate precision components, avoiding all physical shock and
vibration. This applies to failed drives as well as replacement spares.
Use only the packaging provided by Compaq for shipping.
Do not remove hard drives from the shipping package for storage. Keep hard drives in
their protective packaging until they are actually mounted in the CPU.
Avoid dropping drives from any height onto any surface.
Lithium Coin Cell Battery
The battery that comes with the computer provides power to the real-time clock and has a
lifetime of about five years. When replacing the battery, use the appropriate 3-volt lithium coin
cell battery.
See Chapter 4, "Removal and Replacement Procedures," for instructions on the replacement
procedures.
CAUTION: When servicing this computer, ensure that cables are placed in their proper location
during the reassembly process. Improper cable placement can damage the computer.
WARNING: This computer contains a lithium-ion battery. There is a risk of fire and chemical
burn if the battery is handled improperly. Do not disassemble, crush, puncture, short external
contacts, dispose in water or fire, or expose the battery to temperatures higher than
140ºF (60ºC).
Removal and Replacement Preliminaries 3-7
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