I live in Mexico. I have taken my mocrowave/oven combo to a repair facility in the US twice and they can find nothing wrong. The first time I brought it back home and it worked fine for about 6 months. The second time it just went back to being nuts. When I plug it in here, it beeps constantly, cycles thru quantity or beverage code constantly and then the microwave starts on its own. I can stop it with the cancel button and it stops but as soon as I release the button it starts all over again. I have tried to silence the beeper and the panel indicates that sound is off but it still beeps. When I turn the breaker off and back on again I do not get a power failure message. I had an electrician check the wiring from the breaker and he replaced the neutral wire with a larger guage but that did not change things. The electricity comming to the unit is the proper voltage. The repair guy in the US said bring it back but I hesitate to do it for a 3rd time and not be sure I will finally get it fixed.
Any ideas?

Thanks Brian. We took it to a neighbors house and it does the same thing there. Perhaps I need a new control panel and it just happens to work up north?

OK, I replaced the board and now I have a slightly different problem. I do get PF when I trip the breaker but now all of the keys do not work. For example, I can get the microwave to turn on with the add a minute key but the number keys do not respond. Now I am thinking the keypad or perhaps we did not get the ribbon connected properly.

Thanks so much Brian. Something so simple seems to have solved the problem I have been having for months and possibly saved me a lot of money.

Mick