i'm having trouble external display. whenever connect in macbook, flashes between screen, , empty blue screen. once worked, whatever reason stopped. there way reset preferences on external monitor, or display preferences instead? thank help!
eh, helps. connected external monitor macbook while ago, , happened. don't remember did change it, though. macbook plugged power adapter? open displays , check there. i'm pretty sure you've tried these things, remember happening me, , these would've been things tried. eh...good luck. sorry of more help.
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