st arcade cabinet help!

just recently got a super turbo arcade cabinet. after playing for awhile the screen fades to black slowly and doesnt display anything yet you still hear the sounds. turning it off and on right away doesnt do anything. after waiting a couple of hours it works fine and then eventually does the same thing. i had an arcade technician open up my cabinet and look at it. according to his diagnosis, the monitor chassis pcb is dying/old and should be replaced. i wanted to see what you guys think about that. should i spend the money and replace it or would trying a cap kit first be a smarter decision? any second opinions? thanks. anyone in san diego out there that can help with a cap kit? i would hate to mess it up and rather have someone who knows what theyre doing

I don't own a cab but I'd bet it's a cap.

more likely dry joint,cap problems tend to be from cold start but could be the g2 cap on the neck card-almost always a 250v 10uf