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Before You Begin
Dell Precision™ Workstation 350 Service Manual
This section provides procedures for removing and replacing the components, assemblies, and subassemblies in the Dell Precision™ 350 computer. Unless otherwise noted, each procedure assumes that the following conditions exist:
•You have performed the steps in "Precautionary Measures."
•You have read the safety information in your System Information Guide.
•You have opened the computer cover.
Recommended Tools
Your computer is primarily a
•Small
•#1 and #2
•An
It is recommended that you use a wrist grounding strap as explained in "Precautionary Measures."
Precautionary Measures
Use the following safety guidelines to help protect your computer from potential damage and to ensure your own personal safety.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the System Information Guide.
CAUTION: Do not attempt to service the computer yourself, except as explained in your online Dell™ documentation or in instructions otherwise provided to you by Dell. Always follow installation and service instructions closely.
NOTICE: To help avoid possible damage to the system board, wait 5 seconds (or wait until the standby light is extinguished) after turning off the computer and unplugging the power cable before removing a component from the system board or disconnecting a device from the computer.
Before you start to work on the computer, perform the following steps in the sequence listed:
1.Shut down the computer through the Start menu.
2.Ensure that your computer and attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut down your computer, turn them off now.
NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network wall jack.
3.Disconnect any telephone or telecommunication lines from the computer.
4.Disconnect your computer and all attached devices from electrical outlets, and then press the power button to ground the system board.
In addition, take note of these safety guidelines when appropriate:
•When you disconnect a cable, pull on its connector or on its
•Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by its edges or by its metal mounting bracket. Hold a component such as a microprocessor chip by its edges, not by its pins.
Protecting Against Electrostatic Discharge
Static electricity can harm delicate components inside your computer. To prevent static damage, discharge static electricity from your body before you touch any of your computer's electronic components, such as the microprocessor. You can do so by touching an unpainted metal surface on the computer chassis.
As you continue to work inside the computer, periodically touch an unpainted metal surface to remove any static charge your body may have accumulated.
You can also take the following steps to prevent damage from electrostatic discharge (ESD):
•When unpacking a
•When transporting a sensitive component, first place it in an antistatic container or packaging.
•Handle all sensitive components in a
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