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Advanced Troubleshooting
221
Diagnostic Lights
To help you troubleshoot a problem, your computer is equipped with four lights on the
front panel labeled "A," "B," "C," and "D". These lights can be yellow or green. When the
computer starts normally, the lights flash. After the computer starts, the lights remain
green. If the computer malfunctions, the color and sequence of the lights identify the
problem.
CAUTION: Before you begin any of the procedures in this section, follow the
safety instructions in the
System Information Guide
.
D i a g n o s t i c L i g h t C o d e s B e f o r e P O S T
Solid green power
light and no beep
code and no video
during POST
N/A
The monitor or the graphics card
may be faulty or incorrectly
installed.
Check the diagnostic lights to see if
the specific problem is identified.
See "Video and Monitor Problems."
Solid green power
light and no beep
code but the
computer locks
up during POST
N/A
An integrated system board device
may be faulty.
Check the diagnostic lights to see if
the specific problem is identified. If
the problem is not identified,
contact Dell for technical
assistance.
Power Light
Hard-Drive
Light
Problem Description
Suggested Resolution
Light Pattern
Problem Description
Suggested Resolution
No electrical power is supplied to
the computer.
Connect the computer to its electrical outlet. Ensure
that the front-panel power light is on. If the power light
is off, ensure that the computer is connected to a
working electrical outlet and then press the power
button.
If the problem is still not resolved, contact Dell for
technical assistance.
A B C D
= yellow
= green
= off
Summary of Contents for Precision Workstation 650
Page 3: ......
Page 4: ......
Page 14: ...14 Contents ...
Page 40: ...26 About Your Computer Dell Precision 650 w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 41: ...3 S E C T IO N 4 About Your Computer Dell Precision 450 Section TOC ...
Page 50: ...36 About Your Computer Dell Precision 450 w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 83: ...6 S E C T IO N 7 Drives Overview Hard Drive Floppy Drive CD DVD Drive ...
Page 91: ...Drives 77 IDE SCSI Drive 1 power cable 2 hard drive cable 1 2 ...
Page 93: ...Drives 79 IDE SCSI Drive 1 tab 2 2 hard drive 1 2 ...
Page 96: ...82 Drives w w w d e l l c o m s u p p o r t d e l l c o m IDE SCSI Drive ...
Page 119: ...9 S E C T I O N 1 0 Opening the Computer Cover ...
Page 128: ...114 Memory w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 129: ...11 S E C T I O N 1 2 Cards ...
Page 130: ...116 w w w d e l l c o m s u p p o r t d e l l c o m Cards ...
Page 139: ...12 S E C T I O N 1 3 Drives Overview Hard Drive Floppy Drive CD DVD Drive ...
Page 147: ...Drives 133 IDE SCSI Drive 1 hard drive cable 2 power cable 1 2 ...
Page 149: ...Drives 135 IDE SCSI Drive 1 tab 2 2 hard drive 1 2 ...
Page 152: ...138 Drives w w w d e l l c o m s u p p o r t d e l l c o m IDE SCSI Drive ...
Page 172: ...158 Microprocessor Airflow Shroud w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 184: ...170 w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 185: ...16 S E C T I O N 1 7 Battery ...
Page 189: ...17 S E C T I O N 1 8 Closing the Computer Cover ...
Page 192: ...178 Closing the Computer Cover w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 253: ...20 S E C T I O N 2 1 Cleaning Your Computer ...
Page 256: ...242 Cleaning Your Computer w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 260: ...246 Ergonomic Computing Habits w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 282: ...268 Regulatory Notices w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 284: ...270 Regulatory Notices w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 286: ...272 Regulatory Notices w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 287: ...24 S E C T I O N 2 5 Warranty and Return Policy ...
Page 312: ...298 Getting Help w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 326: ...312 Glossary w w w d e l l c o m s u p p o r t d e l l c o m ...