i AM WORKING ON A FRIGIDAIRE S/S REFRIGERATOR tHERE IS POWER TO THE LITE INSIDE NO POWER TO BOTH TEMP DISPLAYS THERE IS A BEEPING SOUND COMING FROM THE TEMPS DISPLAY BUT NO LITE ON THEM. CHECKED THE COMPRESSOR RELAY OKAY COULD IT BE THE DEFROST TIMER? MODEL NUMBER dfhs2313m5 any help appreciated thanks