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Re: my dell latitude e6420 screen goes blank when it has to boot


am very grateful for the response. i tried what u the logo showed "entering diagnostics" but right after the Dell logo screen goes, the screen stays blank forever.

only places the screen displays is there Dell logo and only if i choose to enter BOIS setting..

i also release the single USB port on the left side and the e-SATA port  do not respond when i placed a bootable usb drive in them to try to run windows. the other 2 usb ports by the e-SATA port responded but when i choose to boot from the flash drive, screen goes blank and stays blank forever .please me!!!!!!!!! 

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