I was in the middle of an 8 hour print when my heated bed stopped working so needless to say, my print did not turn out. Upon some investigating I found the connectors on the RAMPS for the hot bed were burnt to a crisp, so there must have been a bad connection. I am just glad it didn't catch anything on fire, because it looks like it got quite hot. If you are having issues with your bed not heating up, I would check those connections ASAP to prevent anymore damage. I tires uploading some pictures but they are too large.