Actually the S means Start.
Ha, yea I acutally meant "S" in my note, but I also thought it was a 5 at first too. I need to test this more as I was definitely hitting start, which indicates it's for the menu, not service. Instead of the menu, I'd just get the cart to reboot and load the slots again. I did have sufficient timer set and was hitting it in time.
To note one thing for people with HAS units, I had some custom buttons and rapid fire set. You'll want to clear all of that while testing for sure.
@ekorz - Yep, exactly that and sometimes I've had variations. Thanks for posting.
@twistedsymphony - you're not far either. We could really knock out some good testing if the three of us got together.