My Dell LCD monitor keeps going black. If I hit the off/on button, it will come back of for a couple of seconds, but then go black. If I turn it off and wait 10 minutes, it will stay on from anywhere from 5 to 20 minutes.
I connected my old monitor to the PC and it's working without a problem.
I plugged the monitor in without connecting to a PC. The same problem occurred. The self-test graphic came on for about ten minutes and then the screen went black. When I immediately turned the monitor off and on, the picture came back for a couple of seconds before going out. I did this repeatedly. After leaving it off for ten minutes, the picture came back for about 15 minutes.