Dell Precision 360 Setup and Quick Reference Guide - Page 28

Diagnostic Lights - video card

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www.dell.com | support.dell.com Power Light Solid green power light and no beep code and no video during POST Solid green power light and no beep code, but the computer locks up during POST Hard-Drive Light N/A N/A Problem Description Suggested Resolution The monitor or the graphics card may be faulty or incorrectly installed. An integrated system board device may be faulty. Check the diagnostic lights to see if the specific problem is identified. See "Video and Monitor Problems" in your User's Guide. Check the diagnostic lights to see if the specific problem is identified. If the problem is not identified, contact Dell for technical assistance. Diagnostic Lights To help you troubleshoot a problem, your computer is equipped with four lights labeled "A," "B," "C," and "D." Diagnostic lights are located on the back of the mini-tower computer and on the front of the desktop computer. When the computer starts normally, the lights flash. After the computer starts, all four lights will display solid green. If the computer malfunctions, the color and sequence of the lights identify the problem. Light Pattern A B C D A B C D Problem Description A possible microprocessor failure has occurred. Memory modules are detected, but a memory failure has occurred. = yellow = green = off Suggested Resolution Reinstall the microprocessor and restart the computer. See your User's Guide for information on how to reinstall the microprocessor for your computer. 1 Remove and reinstall all memory modules. Ensure that all the connector tabs are locked. For optimal performance, install the DIMMs in pairs (1 and 2 and 3 and 4). 2 Restart the computer. 28 Setup and Quick Reference Guid e

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28
Setup and Quick Reference Guide
www.dell.com | support.dell.com
Diagnostic Lights
To help you troubleshoot a problem, your computer is equipped with four lights labeled "A,"
"B," "C," and "D." Diagnostic lights are located on the back of the mini-tower computer and
on the front of the desktop computer. When the computer starts normally, the lights flash.
After the computer starts, all four lights will display solid green. If the computer
malfunctions, the color and sequence of the lights identify the problem.
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"
in your
User’s Guide
.
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
A possible microprocessor failure has
occurred.
Reinstall the microprocessor and restart the
computer. See your
User’s Guide
for
information on how to reinstall the
microprocessor for your computer.
Memory modules are detected, but a memory
failure has occurred.
1
Remove and reinstall all memory modules.
Ensure that all the connector tabs are
locked. For optimal performance, install
the DIMMs in pairs (1 and 2 and 3 and 4).
2
Restart the computer.
A B C D
A B C D
= yellow
= green
= off