hi - while boiling potatoes my burner was not in complete contact with electric burner. now command center will not let me set anything like time, bake temp or use cancel button. after unplugging and replugging in range beeps and displays f5 error code. please help me know what is wrong, if i can fix it myself, how much part will cost and how long it will take. stove is older and not in great shape so i am wondering if repair is worth it or if i need to buy a new entry level ceremic cook top electric. would you have any suggestions on this matter also as to best models and prices. thanks- eric