Seven of the 26 buttons on the touch panel don't work - in no pattern
7 touch buttons don't work, in no apparent pattern. Five of the buttons are in the numeric pad (2, 3, 7, 8, & 9). Biggest problem is that the "Start/Pause" button does not work. The microwave still will power on using the "1" button or the "add 30 sec" button. Can this be repaired or the touch panel be replaced?