Dell System Codes and Messages Dell Dimension 2100 System Reference, Diagnostic Codes

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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
	Power up default.

System board is receiving power, but the BIOS is not executing.

Recovery mode from BIOS failure.

Corrective Action

Make sure that the computer is connected to a known working electrical outlet, and then check whether the front-panel power light is on or off. If the power light is off, check the power supply. If the problem persists, see "Contacting Dell" in the Solutions Guide for instructions on obtaining technical assistance.

Remove all cards. If the computer still does not start, see "Contacting Dell" in the Solutions Guide for instructions on obtaining technical assistance.

Set the configuration jumper to Maintenance mode, and restart the computer. Enter the system setup program and ensure that the processor speed is set correctly. Exit and save the setting. Turn off the computer, reset the configuration jumper to Normal mode, and then restart the computer. Remove all cards and restart the computer to determine if a resource conflict exists. If a conflict exists, resolve the conflict.

If the problem persists, see "Contacting Dell" in the Solutions Guide for instructions on obtaining technical assistance.

Set the configuration jumper to Maintenance mode, and restart the computer. Enter the system setup program and ensure that the processor speed is set correctly. Exit and save the setting. Turn off the computer, reset the configuration jumper to Normal mode, and then restart the computer. If the problem persists, see "Contacting Dell" in the Solutions Guide for instructions on obtaining technical assistance.