Solving Problems
201
Back Panel Lights
When you turn on your computer, it performs a power-on self-test (POST),
which is a series of self-diagnostic checks. A successful POST ends with a
single beep that signifies the start of normal operation. If the computer fails
to emit the single beep or appears to stop responding during POST, a series
of lights located at the rear of the computer can help you understand which
POST test failed or why the computer stopped responding. These lights
indicate problems encountered during POST only, not during normal
operation.
CAUTION:
Before servicing any components inside your computer,
see "
Safety Instructions
."
The light patterns described in the following table can help you determine
what to do to resolve the problem. If a problem resolution requires you to
open the computer chassis, see "
Finding Solutions
" for procedures you
need to complete prior to performing the suggested resolution. If the
problem persists after you perform the suggested problem resolution(s),
contact Dell
for further help.
The following table lists the codes for the back panel diagnostic lights, gives
their probable causes, and offers suggested corrective actions. The light
patterns are shown as they appear on the back of the desktop chassis
(vertical position).
B a c k Pa n e l D i a g n o s t i c L i g h t C o d e s
Light
pattern
Problem Description
Suggested Resolution
off
off
off
off
Normal off condition
or possible pre-BIOS
failure
Verify that the computer is
plugged into a working
outlet and that you have
pressed the power button.
green
yellow
yellow
yellow
Possible BIOS failure;
the computer is in the
recovery mode
Run the BIOS Recovery
Utility, wait for recovery
completion, and restart
the computer to retest.
Summary of Contents for OptiPlex GX50
Page 1: ...w w w d e l l c o m s u p p o r t d e l l c o m Dell OptiPlex GX50 Systems User s Guide ...
Page 10: ...x Contents ...
Page 40: ...38 Abo u t You r C o mp u t er 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 113: ...Installing Upgrades 111 1 Floppy drive cable 2 Lever 1 2 ...
Page 117: ...Installing Upgrades 115 S ma l l D es k t op C om p u te r Small Mini Tow er Comput er ...
Page 136: ...134 Ins ta l l i n g Up g r a d es 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 154: ...152 Microsoft Windows XP Features 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 162: ...160 Te c h n ic a l Sp e c if ic a tio n s 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 210: ...208 So lv ing Pr o ble m s 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 232: ...230 Ge tt ing 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 ...