LCD blinking with horizontal lines as ghosting image of top part of screen

Screen starting to blink with horizontal lines from lower part and more to middle during turned on video. Even youtube affected. If stop video.. after ~1 minute LCD comes clear without and glitching. Looks like coming after heating up, but i started benchmark tests and no reaction on screen.. all was fine even during 100 degrees on all CPU cores.

All diagnostics during booting mac shows all fine no any problems.

Mostly during regular work on mac - lcd works perfectly fine. as soon i started to watch movie or YouTube.. after 20-30 minutes lines raised on bottom of LCD and with next 5-10 minutes rise to middle of screen.

all lines look like shadow (ghost) of the top of lcd image. it's just looks like reflection on the bottom of lcd of top of lcd in real-time. even mouse cursor reflected on that ghost picture on lower screen if i moving it on top of screen.

no extra device connected to mac. all ports work fine. everything else look perfect. didn't fall, no scratches no dents no cracks on body and on screen.

what reasons and how to fix?