This is the same problem i am having with my 1965 willaims teachers pet. At first to even get the game to start ans the flippers to work i had to bend back/paperclip the lock relay but he tilt always stays on on the backglass (diffrent problem) but most importantly the game never ends. Is the balls played unit dirty and needs to be cleaned or are the same problems going on that the other people are having. Whats my next step to solving this problem my teachers pet is going on and on so much hes starting to be a real suckup! Haha help please