Hi. Welcome to JustAnswer.If the answer I provide for you is helpful, please click 'ACCEPT'. I won't be paid if you don't. There are fuses behind the grill/control panel that may be blown.
To access them remove the front grill Two or three screws along the top of the unit and it comes off. If you do not see them remove the conrtrol panel. The screw to do that will be visable once you take the grill off.
You can get a replacement fuse at any Radio Shack, or automotive parts store. Be sure that you get the same type of fuse.
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