Drive handling
IMPORTANT: Drives are fragile components that must be handled with care. To prevent damage to
the computer, damage to a drive, or loss of information, observe these precautions:
● Before removing or inserting a hard drive, shut down the computer. If you are unsure whether
the computer is o or in Hibernation, turn the computer on, and then shut it down through
the operating system.
● Before handling a drive, be sure that you are discharged of static electricity. While handling a drive, avoid
touching the connector.
● Before removing an optical drive, be sure that a disc is not in the drive and be sure that the optical drive
tray is closed.
● Handle drives on surfaces covered with at least 2.54 cm (1.0 in.) of shock-proof foam.
● Avoid dropping drives from any height onto any surface.
● After removing a hard drive or an optical drive, place it in a static-proof bag.
● Avoid exposing an internal hard drive to products that have magnetic elds, such as monitors or speakers.
● Avoid exposing a drive to temperature extremes or liquids.
● If a drive must be mailed, place the drive in a bubble pack mailer or other suitable form of protective
packaging and label the package “FRAGILE.”
Electrostatic discharge damage
Electronic components are sensitive to electrostatic discharge (ESD). Circuitry design and structure determine
the degree of sensitivity. Networks built into many integrated circuits provide some protection, but in
many cases, ESD contains enough power to alter device parameters or melt silicon junctions.
A discharge of static electricity from a nger or other conductor can destroy static-sensitive devices
or microcircuitry. Even if the spark is neither felt nor heard, damage might have occurred.
An electronic device exposed to ESD might not be aected at all and can work perfectly throughout a normal
cycle. The device might function normally for a while and then degrade in the internal layers, reducing its
life expectancy.
IMPORTANT: To prevent damage to the tablet when you are removing or installing internal components,
observe these precautions:
● Keep components in their electrostatic-safe containers until you are ready to install them.
● Before touching an electronic component, discharge static electricity by using the guidelines described in
this section.
● Avoid touching pins, leads, and circuitry. Handle electronic components as little as possible.
● If you remove a component, place it in an electrostatic-safe container.
The following table shows how humidity aects the electrostatic voltage levels generated by dierent activities.
IMPORTANT: A product can be degraded by as little as 700 V.
26 Chapter 4 Removal and replacement procedures preliminary requirements
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