Hello everybody.. new member here. Where do I begin...

I recently purchased a used Star Wars Trilogy Arcade game. It was working great at first... and I placed it in a nice area that has decent traffic... but then the screen went all crazy so I had to send it in to a place for repairs... that cost a nice chunk of change..

So I got it back.. and now it's been about 2 weeks and all was perfect; yet here we go again! The screen flickers.

I hear the sound but the visuals go up and down. I tried to unplug it.. and checked to see if everything was clean. Took all the wires out and put them back in to make sure everything was tight yet it still flickers. Anybody have any guesses?

Any information would be appreciated dearly.