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Hard Drives; Lithium Coin Cell Battery; Sata Hard Drives - HP ProDesk 400 G4 Maintenance And Service Manual

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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 off 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 fields
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!
handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or fire, or
expose it to temperatures higher than 140ºF (60ºC). Do not attempt to recharge the battery.
NOTE:
Batteries, battery packs, and accumulators should not be disposed of together with the 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

Serial ATA Hard Drive Characteristics
Number of pins/conductors in data cable
Number of pins in power cable
Maximum data cable length
Data interface voltage differential
Drive voltages
Jumpers for configuring drive
Data transfer rate
This computer contains a lithium battery. There is a risk of fire and chemical burn if the battery is
7/7
15
39.37 in (100 cm)
400-700 mV
3.3 V, 5 V
N/A
6.0 Gb/s
SATA hard drives
13

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