Dell T105 Systems Diagnostic Lights, Diagnostic Indicator Codes Causes, Information only

Diagnostic Lights

The four diagnostic indicator lights on the system front panel display error codes during system startup. Table 1-5 lists the causes and possible corrective actions associated with these codes. A highlighted circle indicates the light is on; a non-highlighted circle indicates the light is off.

NOTE: If the power LEDs blink amber, there is a problem with the power supply. If the power LED shows a solid amber, a BIOS failure occurred before Power-On Self Test (POST).

Table 1-5. Diagnostic Indicator Codes

Code Causes Corrective Action

The computer is in a normal off condition or a possible pre-BIOS failure has occurred.

The diagnostic lights are not lit after the system successfully boots to the operating system.

Plug the computer into a working electrical outlet and press the power button.

The system is in a normal	Information only.
operating condition after
POST.
BIOS checksum failure	See "Getting Help" on page 137.
detected; system is in
recovery mode.
Possible processor failure. See "Troubleshooting the
	Microprocessor" on page 125.
Memory failure.	See "Troubleshooting System
	Memory" on page 114.
Possible expansion card	See "Troubleshooting Expansion
failure.	Cards" on page 123.

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