Dell Vostro 1200 Owner's Manual - Page 73

Troubleshooting Tools, Diagnostic Lights, Diagnostic Light Codes During POST - service manual

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10 Troubleshooting Tools Diagnostic Lights CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. Your computer has three keyboard status lights located above the keyboard (see "Front View" on page 19). During normal operation, the keyboard status lights display the current status (on or off) of the Num Lock, Caps Lock, and Scroll Lock features. If the computer starts without error, the lights flash, and then turn off. If the computer malfunctions, however, you can use the status of the lights to help identify the problem. NOTE: After the computer completes POST, the Num Lock light may remain on, depending on your BIOS settings (see "Commonly Used Options" on page 102). Diagnostic Light Codes During POST To troubleshoot a problem with your computer, read the sequence of the keyboard status lights in order from left to right (Num Lock, Caps Lock, and then Scroll Lock). If the computer malfunctions the individual lights display a status of either On , Off , or Flashing . Light Pattern Problem Description Suggested Resolution The microcontroller is • Reseat the processor (see your Service handing control of Manual). the system to the • If the problem persists, contact Dell Pentium controller. If (see "Contacting Dell" on page 129). no processor is installed, or there is no FWH/ROM, this code persists. Troubleshooting Tools 73

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Troubleshooting Tools
73
10
Troubleshooting Tools
Diagnostic Lights
CAUTION:
Before you begin any of the procedures in this section, follow the
safety instructions in the
Product Information Guide
.
Your computer has three keyboard status lights located above the keyboard
(see "Front View" on page 19). During normal operation, the keyboard status
lights display the current status (
on
or
off
) of the Num Lock, Caps Lock, and
Scroll Lock features. If the computer starts without error, the lights flash, and
then turn off. If the computer malfunctions, however, you can use the status
of the lights to help identify the problem.
NOTE:
After the computer completes POST, the Num Lock light may remain on,
depending on your BIOS settings (see "Commonly Used Options" on page 102).
Diagnostic Light Codes During POST
To troubleshoot a problem with your computer, read the sequence of the
keyboard status lights in order from left to right (Num Lock, Caps Lock, and
then Scroll Lock). If the computer malfunctions the individual lights display
a status of either
On
,
Off
, or
Flashing
.
Light Pattern
Problem Description
Suggested Resolution
The microcontroller is
handing control of
the system to the
Pentium controller. If
no processor is
installed, or there is
no FWH/ROM, this
code persists.
•
Reseat the processor (see your
Service
Manual
).
•
If the problem persists, contact Dell
(see
"Contacting Dell" on page 129
).