tc65fx800 TV - has sound but no picture

My tv has a crack on the left top corner, but it was still working fine, sometimes picture would turn off but after a few on/off attempts and a slight touch in the corner picture would dry on. Now unfortunately it doesn’t turn on anymore. I can hear the sound on Netflix but no picture. Even though the screen was cracked/donged on the top left corner I didn’t mind . Is there a simple fix for this ? Why was it working before ? Why is the sound working but no picture ? Tv is 6 months old damaged by movers.

Just a quick note, after squeezing the Tv all around and shaking it a little bit Ian’s after a few attempts on/off picture came back not sure why but it did. I would like a proper fix to this even if the tv has a crack. Thanks