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Disconnect the modem cable before opening a product enclosure, touching or
installing internal components, or touching an uninsulated modem cable or jack.
Do not use a telephone line to report a gas leak while you are in the vicinity of the
leak.
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Observe the following precautions for laser devices:
Do not open any panels, operate controls, make adjustments, or perform proce-
dures on a laser device other than those specified in the product’s
documentation.
Only authorized service technicians should repair laser devices.
Before you remove the computer covers, perform the following steps in the sequence
indicated.
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1. Turn off your computer and any peripherals.
2. Ground yourself by touching
an unpainted metal surface on the chassis, such as
the metal around the card-slot openings at the back of the computer, before
touching anything inside your computer.
While you work, periodically touch an unpainted metal surface on the computer
chassis to dissipate any static electricity that might harm internal components.
3. Disconnect
your computer and peripherals from their power sources. Also, dis-
connect any telephone or telecommunication lines from the computer.
Doing so reduces the potential for personal injury or shock.
In addition, take note of these safety guidelines when appropriate:
When you disconnect a cable, pull on its connector or on its strain-relief loop, not
on the cable itself. Some cables have a connector with locking tabs; if you are dis-
connecting this type of cable, press in on the locking tabs before disconnecting the
cable. As you pull connectors apart, keep them evenly aligned to avoid bending any
connector pins. Also, before you connect a cable, make sure that both connectors
are correctly oriented and aligned.