Networked Printer stopped working – UGH!!

I really need some help on this. I have a printer hooked up direct to my machine and it was being shared, allowing my co-workers to use it. It has since stopped working and I can’t get to allow my co-workers to print to it again. I can still. My boss is getting ticked at me, but my network knowledge is only so broad and I ran out of solutions, Please HELP!