Users Guide

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InternalComponents:DellPrecision™WorkStation420SystemsUser'sGuide
Overview
This section provides troubleshooting procedures for components inside your computer. Before you start any of the procedures in this section, do
the following:
l Perform the procedures described in "Checking Connections and Switches" and "System Setup."
l Read the safety instructions in "Safety First—For You and Your Computer."
You need the following items to perform the procedures in this section:
l Your Dell Precision ResourceCD
l A small flat-blade screwdriver and a #1 Phillips-head screwdriver (or quarter-inch hex-nut driver)
Your system also includes an interior system service label affixed to the inside of the computer cover (see Figure 1 and Figure 2 for the location of
this label on the mini tower and desktop chassis, respectively). This label shows the location of components within the chassis and locations of
system board components and connectors. It also contains an important notice that provides instructions you need to follow to help prevent
damage to your system board while you troubleshoot your computer system.
Figure 1. Mini Tower Chassis Interior Service Label
Figure 2. Desktop Chassis Interior Service Label
Overview
Troubleshooting Expansion Cards
Safety First—For You and Your Computer
Troubleshooting System Memory
Removing and Replacing the Computer Cover
Troubleshooting the Video Subsystem
Troubleshooting a Wet Computer
Troubleshooting the System Board
Troubleshooting a Damaged Computer
Troubleshooting a Dead System Board With the RTCRST Jumper
Troubleshooting the Battery
Troubleshooting Drives