I have a kenmore semi new stove and oven combo.Last night i was cooking in the oven and went to check my food and the stove display (which is digital) was not on.The light on the inside was working fine and when i went to cut on one of the burneres the dispay said PF.I talked to a few people and they said PF stands for power failure.It wont heat up or anything??I flipped the breaker and it still does the same thing.Do i need a new stove???anyone ever heard of this before???And know i dont have a manual for the stove??Any insight into the situation would be greatly appreciated.