Radio Trouble

[Tomd]

Hey Guys I am in need of a little help on my car. Currently the radio does not work. Its the stock radio that somehow I got to work for about a week in the fall. Right now the warning buzzer sometimes comes on when I turn the key but sometimes doesn't. I am thinking a loose ground or something. Also one other thing the radio is getting power because I can turn it on but no sound is comming out of the speakers, however I don't know if it is drawing too much because my clock dims out till you can barely see it when you turn on the radio. Thanks for the help

Tom

Edit: Sorry I didn't know if I should have put this in the interior forum or here.