Steve- I have a Travel Time, or at least I will for a few more weeks. I hope it’s going to my friends house soon. I’ll admit I don’t have a schmetic or manual either. But I have gone through it and have everything working as it should. My first thought is there is one electronic part on this pin, it’s the timer that pulses the count down of the clock mechanism. This timer is located on the underside the play field, front center. It’s possible the capacitor on the timer board is bad causing it to pulse at a rapid rate, therefore counting back down immediately after starting. I would temporarily discount the output from this board and see if the clock goes back to zero. That’s just the first thought off the top without digging deeper. Best of luck. Mike