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Safety Precautions
Observe the following safety precautions when you perform any installation or break/fix procedures
involving disassembly or reassembly:
Turn off the system and all attached peripherals.
Disconnect the system and all attached peripherals from AC power, and then remove the battery.
Disconnect all network cables, telephone or telecommunications lines from the system.
Use a wrist grounding strap and mat when working inside any computer system to avoid
electrostatic discharge (ESD) damage.
After removing a system component, carefully place the removed component on an anti-static mat.
Wear shoes with non-conductive rubber soles to help reduce the risk of being shocked or seriously
injured in an electrical accident.
Standby Power
Dell products with standby power must be completely unplugged before the case is opened. Systems that
incorporate standby power are essentially powered while turned off. The internal power enables the system
to be remotely turned on (wake on LAN), suspended into a sleep mode, and have other advanced power
management features.
After you unplug a system and before you remove components, wait approximately 30 to 45 seconds to
allow the charge to drain from the circuits. Remove the battery from portable computers.
Bonding
Bonding is a method for connecting two or more grounding conductors to the same electrical potential.
This is done through the use of a Field Service ESD kit. When connecting a bonding wire, always ensure
that it is connected to bare metal and never to a painted or non-metal surface. The wrist strap should be
secure and in full contact with your skin, and be sure to always remove all jewelry such as watches,
bracelets, or rings prior to bonding yourself and the equipment.
Bonding Properly
Electrostatic Discharge Protection
ESD is a major concern when you handle electronic components, especially sensitive components such as
expansion cards, processors, memory DIMMs, and system boards. Very slight charges can damage circuits
in ways that may not be obvious, such as intermittent problems or a shortened product life span. As the
industry pushes for lower power requirements and increased density, ESD protection is an increasing
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