Dell OptiPlex GX300 User Manual
Page 43
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Internal Components: Dell™ OptiPlex™ GX300 System 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 "
."
You need the following items to perform the procedures in this section:
l
A copy of the Dell ResourceCD
l
A small flat-blade screwdriver and a #1 Phillips-head screwdriver (or quarter-inch hex-nut driver)
Safety First
—For You and Your Computer
The procedures in this section require that you remove the cover and work inside your computer. While working inside your computer, do not
attempt to service the computer except as explained in this guide and elsewhere in Dell documentation. Always follow the instructions closely.
Working inside your computer is safe
—if you observe the following precautions.
Before you start to work on the computer, perform the following steps in the sequence indicated:
1. Turn off the computer and all peripherals.
2. Touch an unpainted metal surface on the computer chassis, such as the metal around the card-slot openings at the back of your computer,
before touching anything inside your computer.
3. Disconnect the computer and peripherals from their electrical outlets. Doing so reduces the potential for personal injury or shock. Also
disconnect any telephone or telecommunication lines from the computer.
While you work, periodically touch an unpainted metal surface on the computer chassis to dissipate any static electricity that might
harm internal components.
In addition, Dell recommends that you periodically review the safety instructions in your System Information Guide.
Removing and Replacing the Computer Cover
To remove the computer cover, perform the following steps:
1. Turn off your computer and peripherals, and observe the Caution for Your Personal Safety and Protection of Your Equipment as described
Troubleshooting Expansion Cards
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
CAUTION FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT
NOTE: Before disconnecting a peripheral from the system or removing a component from the system board, verify that the
standby power light-emitting diode (LED) on the system board has turned off. For the location of this LED, see
Figure 3
in
"Inside Your Computer."