Contents 11
No sound from speakers . . . . . . . . . . . . . . . . . . . . 213
No sound from headphones
. . . . . . . . . . . . . . . . . . 214
System Board Problems
. . . . . . . . . . . . . . . . . . . . . 215
Video and Monitor Problems
. . . . . . . . . . . . . . . . . . . 216
If the screen is blank
. . . . . . . . . . . . . . . . . . . . . 216
If the screen is difficult to read
. . . . . . . . . . . . . . . . 217
19 Advanced Troubleshooting
Diagnostic Lights . . . . . . . . . . . . . . . . . . . . . . . . . 220
System Lights
. . . . . . . . . . . . . . . . . . . . . . . . . 220
Diagnostic Lights
. . . . . . . . . . . . . . . . . . . . . . . 221
Beep Codes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Dell Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . 229
When to Use the Dell Diagnostics
. . . . . . . . . . . . . . . 229
Starting the Dell Diagnostics . . . . . . . . . . . . . . . . . 230
Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
What Is a Driver?
. . . . . . . . . . . . . . . . . . . . . . . 232
Identifying Drivers . . . . . . . . . . . . . . . . . . . . . . 233
Reinstalling Drivers
. . . . . . . . . . . . . . . . . . . . . . 233
Using System Restore
. . . . . . . . . . . . . . . . . . . . . . 235
Creating a Restore Point
. . . . . . . . . . . . . . . . . . . 235
Restoring the Computer to an Earlier Operating State
. . . . . 235
Undoing the Last System Restore
. . . . . . . . . . . . . . . 236
Resolving Software and Hardware Incompatibilities
. . . . . . 237
Windows XP
. . . . . . . . . . . . . . . . . . . . . . . . . 237
Windows 2000
. . . . . . . . . . . . . . . . . . . . . . . . 238
20 Cleaning Your Computer
Before Cleaning Your Computer . . . . . . . . . . . . . . . . . 240
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