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Ask need DELL Latitude E7470 Bios bin file

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before programing , power led light 2 ampers and 5 white. which meaning the ram is not compatible. i tried another ram (same problem).
after programing power led stay white solid. but there is nothing on screen (Black Screen).
 
before programing , power led light 2 ampers and 5 white. which meaning the ram is not compatible. i tried another ram (same problem).
after programing power led stay white solid. but there is nothing on screen (Black Screen).
need check hardware
 

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