Display isn't working.HELP!
 

So ive dismounted everything as the display was showing random symbols etc. Now at first the a/c buttons etc didn't work when I reinstalled the front panel...after some time I managed to do so but the display still isn't working unless i really press it hard(sometimes it doesn't work if I re-install it, I must try several times). Any help or tips about this please? I took the liberty of taking a small video.

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