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Dell led codes

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Keyboard Status Lights

numpad - caps lock - scrol lock (light code given in serial)

The green lights located above the keyboard indicate the following:
Turns on when the numeric keypad is enabled.
Turns on when the Caps Lock function is enabled.
Turns on when the Scroll Lock function is enabled.

LED Error Codes

The following table shows the possible LED codes that may display in a no-POST situation.
Appearance
Description
Next Step
ON-FLASH-FLASH
No SODIMMs are installed
  1. Install supported memory modules.
  2. If memory is already present, reseat the module(s) one at time in each slot.
  3. Try known good memory from another computer or replace the memory.
  4. Replace the system board.
FLASH-ON-ON
System board error
  1. Reseat the processor.
  2. Replace the system board.
  3. Replace the processor.
FLASH-ON-FLASH
Display panel error
  1. Reseat the display cable.
  2. Replace the display panel.
  3. Replace the video card/system board.
OFF-FLASH-OFF
Memory compatibility error
  1. Install compatible memory modules.
  2. If two modules are installed remove one and test. Try the other module in the same slot and test. Test the other slot with both modules.
  3. Replace the memory.
  4. Replace the system board.
ON-FLASH-ON
Memory is detected but has errors
  1. Reseat the memory.
  2. If two modules are installed remove one and test. Try the other module in the same slot and test. Test the other slot with both modules.
  3. Replace the memory.
  4. Replace the system board.
OFF-FLASH-FLASH
Modem error
  1. Reseat the modem.
  2. Replace the modem.
  3. Replace the system board.
FLASH-FLASH-FLASH
System board error
  1. Replace the system board.
FLASH-FLASH-OFF
Option ROM error
  1. Reseat the device.
  2. Replace the device.
  3. Replace the system board.
OFF-ON-OFF
Storage device error
  1. Reseat the hard drive and optical drive.
  2. Test the computer with just the hard drive and just the optical drive.
  3. Replace the device that is causing the failure.
  4. Replace the system board.
FLASH-FLASH-ON
Video card error
Replace the system board.

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