Network Problems

45

Power Problems

46

Printer Problems

47

Scanner Problems

47

Sound and Speaker Problems

48

No sound from speakers

48

No sound from headphones

49

Video and Monitor Problems

50

If the screen is blank

50

If the screen is difficult to read

50

4 Advanced Troubleshooting

Diagnostic Lights

53

Dell Diagnostics

56

When to Use the Dell Diagnostics

56

Drivers

59

What Is a Driver?

59

Identifying Drivers

59

Reinstalling Drivers

60

Using Microsoft® Windows® XP System Restore

61

Creating a Restore Point

62

Restoring the Computer to an Earlier Operating State

62

Undoing the Last System Restore

62

Using Dell PC Restore by Symantec

63

Resolving Software and Hardware Incompatibilities

64

Reinstalling Microsoft® Windows® XP

64

Before You Begin

64

Reinstalling Windows XP

65

Contents

5

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Dell U7021, WHL manual Using Microsoft Windows XP System Restore, Restoring the Computer to an Earlier Operating State