Diagnostic Lights (Optional)

The four diagnostic indicator lights on the system front panel display error codes during system startup. Table 1-1 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: The diagnostic LEDs are not present when the system is equipped with an LCD display.

Table 1-1. Diagnostic Indicator Codes (Optional)

Code

Causes

Corrective Action

The system 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 system 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 167.

 

 

detected; system is in

 

 

recovery mode.

 

 

 

 

Possible processor failure. See "Troubleshooting the

 

 

Microprocessors" on page 160.

 

 

 

 

Memory failure.

See "Troubleshooting System

 

 

Memory" on page 152.

 

 

 

 

Possible expansion card

See "Troubleshooting Expansion

 

failure.

Cards" on page 159.

 

 

 

 

Possible video failure.

See "Getting Help" on page 167.

About Your System

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Dell R410 owner manual Diagnostic Lights Optional