Dell OptiPlex GXa Service Manual - Page 98
Precautionary Measures
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Precautionary Measures Before you perform any of the procedures in this chapter, take a few moments to read the following warning for your personal safety and to prevent damage to the system from ESD. WARNING FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT: Before you start to work on the system, perform the following steps in the sequence listed. 1. Turn off the computer and any attached peripherals. 2. Disconnect the computer and any attached peripherals from their power sources to reduce the potential for personal injury. Also, disconnect any telephone or telecommunication lines from the computer. 3. Wait 5 seconds after powering down the computer before disconnecting a peripheral from the computer or removing a component from the computer's system board to avoid possible damage to the system board. 4. Wear a wrist grounding strap, and clip it to an unpainted metal surface, such as the padlock loop on the back of the chassis. If a wrist grounding strap is not available, periodically touch an unpainted metal surface on the back of the computer to discharge any static charge from your body. Avoid touching components and contacts on a card, and avoid touching pins on a chip to prevent static electricity damage. 5-2 Dell OptiPlex GXa and OptiPlex NX Systems Service Manual