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stand alone screen goes white
Roy Bingham that is your backlight turning on. What your monitor does not seem to get ais the video signal. make sure everything is connected properly and then remove the back of your monitor. Let’s take a look at your boards so post some images of your board(s) with your question. Use this guide Adding images to an existing question for that. This videoay 0:50 shows you how to disassemble your monitor
