04-06-2006, 03:47 PM
I have a G4 iMac 17" 1 GHz with video problems as well. The backlight comes on but no video. I can hook up a monitor to the external and use the computer. Could this be a problem with the logic board video chip? Or, could something have worked loose? The external video connector is soldered to the logic board while the lcd display uses a socket.