15 inch retina a1398 sometimes display sometimes not any idea?

speedyaction

New member
Hi guys. I have strange macbook here a1398 model. is have problem with display. Sometimes when i press power button i can hear sound but no picture. Today i done this same and is powering up and display no problem. I done all reset pram and smc but this problem is coming back sometimes. Any idea why is like that?
 
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