We have a Jenn-Air, Microwave Model# JMC7000 with 1400 Watt and a Jenn-Air Electric Convection. The Microwave has gone bad (control board #56001396) and supposedly no one can get a replacement board or fix it. Do you know if that is correct? And if not is there a same-size replacement model for the JMC7000ADB? We were told the only thing we could do was to replace the entire microwave/oven combo which is several thousands and the oven is perfectly fine.