Review and follow these precautions to prevent damage to the unit, to protect data, and to avoid personal injury.

Before you begin

  1. Put on your electrostatic discharge (ESD) wrist or shoe strap to avoid damaging any circuitry.
  2. Place an ESD mat on a suitably grounded surface, and then place the unit on the mat.
  3. Remove any devices, such as diskettes, tape cartridges, or CD-ROMs, from the unit being serviced.
  4. Power off the unit and any peripheral devices that are connected to it.

    Note: Replacing a hot plug device does not require powering down the system.
  5. Disconnect the power cord from the electrical outlet and then from the unit. When a unit is plugged into an AC power source, there is always voltage applied to the unit. You must disconnect the power cord from the power source before opening the unit.
  6. Disconnect all peripheral device cables from the unit.

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Static electricity

Static electricity can damage electrical components. Before removing or replacing a component, observe the following precautions to prevent damage to electric components and accessories:

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Ensure that you take the following precautions before you disassemble a system:

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