I played a game on GotG tonight and had a score of 400k. It was an 'eh' game but then "Enter Your Initials" came up. I knew I hadn't done anything really good in the game, so I was totally confused. I put my initials in, and it said High Score #1.
That's nowhere near my previous high scores, so I ran thru the list. Everything was back to default except the GC. I'm sure no one would have done a reset. I don't even keep the keys in the machines.
So it got me thinking... Could it be because I leave the machines on for extended periods. I usually play a few games every night. I don't play every machine, but I'll usually play a couple of different ones. Normally, I leave the machines on when I finish...in case I want go back later. That usually means they are on overnight or maybe even a couple of nights. I know it's wasteful, but is it harmful to the machine?