IMPORTANT: When servicing this computer, be sure to place cables in their proper location during the
reassembly process. Improper cable placement can damage the computer.
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.
● If a drive must be mailed, place the drive in a bubble-pack mailer or other suitable protective packaging
and label the package “Fragile: Handle With Care.”
● 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 computer.
● Avoid dropping drives from any height onto any surface.
● If you are inserting or removing a hard drive, turn o the computer. Do not remove a hard drive while the
computer is on or in standby mode.
● Before handling a drive, ensure that you are discharged of static electricity. While handling a drive, avoid
touching the connector.
● Do not use excessive force when inserting a drive.
● Avoid exposing a hard drive to liquids, temperature extremes, or products that have magnetic elds
such as monitors or speakers.
Lithium coin cell battery
The battery that comes with the computer provides power to the real-time clock and has a minimum lifetime
of about three years.
See the appropriate removal and replacement chapter for the chassis you are working on in this guide for
instructions on the replacement procedures.
WARNING! This computer contains a lithium battery. There is a risk of re and chemical burn if the battery is
handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or re, or
expose it to temperatures higher than 140°F (60°C). Do not attempt to recharge the battery.
NOTE: Do not dispose of batteries, battery packs, and accumulators with general household waste. In order
to forward them to recycling or proper disposal, please use the public collection system or return them to HP,
their authorized partners, or their agents.
SATA hard drives
Table
3-4 SATA hard drive characteristics
Serial ATA hard drive characteristics
Number of pins/conductors in data cable 7/7
Number of pins in power cable 15
Maximum data cable length 100 cm (39.37 in)
Data interface voltage dierential 400 mV–700 mV
Drive voltages 3.3 V, 5 V, 12 V
SATA hard drives 21
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