Occasionally, when in Florida, I turn on the machine, and get to the menu, but when I click on a program, the graphics just fade in and out, and nothing happens. I open the battery housing for a few minutes, and it usually works normally. I think it's due to coming out of an air conditioned setting to a humid one. Problem #2 is at times the machine goes bonkers, all sorts of bells and whistles for no apparent reason. I usually switch to the coin mode, and after about ten minutes, return to beach/jewelry mode, and problem is gone. Anybody got an answer? Thanks.