That's not real uncommon. I sold mine to a guy on here a while back. His went out as well. You may try checking the harness to see if it has power. If it does go to a junk and try to find another clock.
Ditto for me. Dimming and brightening the dash lights would make it go on and off for me. I was told replace the headlight switch or take it out and clean the contacts and put back in.