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
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
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