Dell OptiPlex GXa, Service Manual, Page: 122 / 181

6-2 Dell OptiPlex GXa and OptiPlex NX Systems Service Manual
P
recautionary 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, per-
form 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, dis-
connect 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 compo-
nent 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 sur-
face, 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.