my hp external display is not found
Have been using HP w19b as an external monitor for almost a year. I have a 2009 (late) 27" imac and am running 10.8.2. My external monitor went to sleep and never woke up on Nov 11, 2012. I don't think there were any new updates on this date. Had been on 10.8.2 for a while??? When I go to preferences, it is as though it is not even connected. I unplugged and re-plugged all connections. The monitor is not broken, just goes to sleep because it is getting no signal from imac. What in the world. Please help. I need the screen real estate!!!! The connection is the mini display port? to AVG adapter...
iMac, OS X Mountain Lion (10.8.2)