pro c
try holding down the prg - and right arrow,then hit reset on back of faceplate,continue holding the three buttons until 12 am is displayed on screen. this might fix it,this periodically happens. not saying this will fix it,but it could,if it doesnt you need to get a competent service tech out there lol, but not before you do what mitchgo says,that needs to be done to find the problem. do any zones work manually from clock.