Contribution d'origine par : originalmachead ,
'''Connect to an external monitor '''to determine if this is your video card or a problem in the internal LCD display chain. ''If an external monitor shows nothing could be your video card/logic board.'' If that display works you'll have to open the machine and check the diagnostic lights to see if it's cables. backlight or LCD. Follow the tags on the right for more information. ''If this Answer is helpful '''please remember to return and mark it '''Accepted.''