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Portable Power on Self Test (POST) Diagnostic LED Codes

Failure of a Dell portable computer built in the year 2006 or later to complete the POST (Power-on Self Test) process will
result in an LED code sequence that utilizes the Num Lock, Cap Lock, and Scroll Lock. The LED codes represent specific
points during the POST process of the system.


 

Dell Portable POST LED Codes

The table below details what each code represents during the POST process.

Note: The Action That May Be Necessary column should only used as a guide for your actions and may not represent complete troubleshooting or root cause of the problem.

 

Flash Code
Description
Action That May Be Necessary
The Microcontroller is handing control of the system to the processor. This code will persist if there is no processor detected.

1. Reseating the processor.
2. Replacing the processor.
3. Replacing the system board.

The memory has encountered an error. 1. Reseating the memory.
2. Replacing the memory.
3. Replacing the system board.
A system board component is faulty.  Replacing the system board.
The video card is preventing the system from completing POST. 1. Replacing the video card.
2. Replacing the system board.
The keyboard is preventing the system from completing POST. 1. Reseating the keyboard cable.
2. Replacing the keyboard.
3. Replacing the system board.
USB controller initialization. 1. Removing any USB devices.
2. Replacing the system board.
No SODIMM installed. 1. Installing the memory.
2. Reseating the memory.
3. Replacing the memory.
4. Replacing the system board.
Turning on the LCD panel (after video configuration). 1. Reseating the LCD cable.
2. Replacing the LCD panel.
3. Replacing the video card.
The modem is preventing the system from completing POST. 1. Reseating the modem.
2. Replacing the modem.
3. Replacing the system board.


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