Diagnostic Codes - Dell Dimension 2100 System Reference Manual

NOTICE: The Dell Dimension ResourceCD contains drivers for devices
that are not part of your computer. Only reinstall the specific drivers for
hardware included in your computer. Otherwise, your computer might
not work correctly.
4. Select a topic in the Topic list.
If you select Drivers in the Topic list and a particular driver is not listed, then
that driver is not required by your operating system.
System Codes and Messages: Dell™ Dimension™
2100 System Reference

Diagnostic Codes

POST Beep Codes
System Messages
Diagnostic Codes
Your computer is equipped with four diagnostic code lights, which are labeled "A," "B,"
"C," and "D" on the back of the computer. Each of the four lights can be yellow, green,
or off, as shown in Table 1. When the computer is turned on or restarted and is
functioning normally, the lights flash during power-on self-test (POST). After the
computer starts, the lights remain green to signify normal computer operation.
If a malfunction is detected and the computer fails to start, the lights display a code that
identifies the problem. Write down the diagnostic code displayed and look it up in Table
1.
Table 1. Diagnostic Codes
Diagnostic Code Definition Corrective Action