Do not modify or tape the latches to keep the display open or
closed.
Do not turn your computer over while the ac adapter is plugged
in. This could break the adapter plug.
Do not move the computer when the hard disk drive is accessing
data (when the indicator is blinking).
Do not use or store your computer where the temperature is
below 5° C or above 35° C (41° F and 95° F).
Do not place your computer closer than 13 cm (5 in.) to any
electrical appliance that generates a strong magnetic field, such
as a motor, a magnet, a TV, a refrigerator, or large audio
speakers.
Do not put an operating cellular phone on the computer. The
phone might cause malfunction in the computer system.
Do not hard-mount your computer in a vehicle or anywhere that it
is subject to strong vibration.
Do not crush, drop, or physically punish the external or
removable hard disk, diskette, or CD-ROM drive when it is
outside your computer.
Do not press on the middle part of the diskette drive or the
CD-ROM drive.
Do not insert a diskette at an angle. Not inserting the diskette
straight into the drive can damage the drive.
Do not attach more than one label to a diskette, and do not allow
the label to be loose. Multiple or loose labels can detach or tear
and then lodge in the drive.
Do not touch the lens on the CD-ROM tray.
Do not close the CD-ROM tray until you hear the CD-ROM click
into the center pivot of the CD-ROM drive.
Do not touch the surface of a compact disc; handle the compact
disc only by its edges.
Do not connect the modem to a PBX (private branch exchange)
or other digital telephone extension line. Your computer can
use only a public-switched telephone network (PSTN). The
use of a phone line other than PSTN can damage your modem.
If you are not sure which kind of phone line you are using,
contact your telephone company. Many hotels or office buildings
use digital telephone extension lines, so check before connecting
the telephone cable in such places.
Do not leave the base of your computer in contact with your lap
or any part of your body for an extended period when the
xii IBM ThinkPad T20 User's Reference
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