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Dell OptiPlex 755 - Page 14

Dell OptiPlex 755
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14 Contents
Lockups and Software Problems . . . . . . . . . . . . . . . . . . . 336
The computer does not start up
. . . . . . . . . . . . . . 336
The computer stops responding
. . . . . . . . . . . . . . 336
A program stops responding
. . . . . . . . . . . . . . . . 336
A program crashes repeatedly . . . . . . . . . . . . . . . 337
A program is designed for an earlier Windows
operating system
. . . . . . . . . . . . . . . . . . . . . 337
A solid blue screen appears . . . . . . . . . . . . . . . . 337
Other software problems
. . . . . . . . . . . . . . . . . 337
Memory Problems
. . . . . . . . . . . . . . . . . . . . . . . . . . 338
Mouse Problems
. . . . . . . . . . . . . . . . . . . . . . . . . . 338
Network Problems
. . . . . . . . . . . . . . . . . . . . . . . . . 339
Power Problems . . . . . . . . . . . . . . . . . . . . . . . . . . 339
Troubleshooting Power Problems
. . . . . . . . . . . . . 339
Power Supply Self-Test
. . . . . . . . . . . . . . . . . . 340
Printer Problems . . . . . . . . . . . . . . . . . . . . . . . . . . 341
Scanner Problems . . . . . . . . . . . . . . . . . . . . . . . . . 342
Sound and Speaker Problems
. . . . . . . . . . . . . . . . . . . . 342
No sound from speakers
. . . . . . . . . . . . . . . . . . 342
No sound from headphones
. . . . . . . . . . . . . . . . 343
Video and Monitor Problems
. . . . . . . . . . . . . . . . . . . . . 343
The screen is blank
. . . . . . . . . . . . . . . . . . . . 343
The screen is difficult to read
. . . . . . . . . . . . . . . 343
3D image quality is poor . . . . . . . . . . . . . . . . . . 344
Power Lights
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344
System Lights
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345
Diagnostic Lights
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 347
Beep Codes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350
System Messages
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 351
Dell Diagnostics
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
When to Use the Dell Diagnostics
. . . . . . . . . . . . . . . . . . 353
Starting the Dell Diagnostics From Your Hard Drive
. . . . . 353
Starting the Dell Diagnostics From the Drivers and Utilities
CD (Optional)
. . . . . . . . . . . . . . . . . . . . . . . 354
Dell Diagnostics Main Menu . . . . . . . . . . . . . . . . 355
Drivers
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356

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