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Observe the following guidelines when working with options:

‡Do not connect or use a modem or telephone during a lightning storm. There may be a risk of electrical shock from lightning.

‡Never connect or use a modem or telephone in a wet environment.

‡Do not plug a modem or telephone cable into the network interface controller (NIC) receptacle.

‡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.

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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.

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