Thread: Cannot See my Radio's Display

hey guys. i just installed a stock radio that i bought on craigslist into my car. I had to unlock it by entering the codes and such and when i did that the display worked fine. But now that i got everything buttoned back up, the display is so dim to the point that i cannot even see it in the dark. whats the problem? is there a loose wire or something? i know the radio display is an issue in GM cars, is this just a case of that? help me out here...