Just bought the game and was taking a look under the hood yesterday night, it is my first Stern. There is no EOS in the upper right flipper; does the game drop voltage to the flipper when the right side flippers are being held up even if there is no EOS? After a brief test game I noticed a slight humm from what I believe was the upper flipper and was afraid something is gonna burn if kept up too long.

All 3 flipper mechanisms were totally cr*pped out and I rebuilt all of them before even properly testing the game. They all work super snappy now but the humm made me think about the missing EOS and how the system limits voltage during flipper hold up. Thanks already for the answers.

Thx for the replies guys, not to worry about the humming then. Just spent the last two days changing bulbs and ripping the game apart as I always do when I get a new one in the garage. Horrible wear on the pit in front of the playfield but otherways it cleaned up really nice. I will have to buy some liquid wood putty to fix the pit and put a new cliffy on it. There is plenty to play in this one, just scored 35mil and have a feeling I just scratched the surface and made it just 3rd on the hiscore list. A great trade on my Demoman