I bought a used clock light bulb from a junk yard today. I tryed installing it but it still won't light up. The clock still works but no light. The bulb looks good unlike my old one. I turned it into different positions to see if it worked every which way, or there was a sweet spot, but nothing. Any tips? I'm gonna have my dad take a look at it tomorrow, hopefully its just something dumb. Just looking for advice. Thanks.