2930 Views 4 Replies Latest reply: Nov 21, 2009 7:14 AM by tdefrange
Thanks, but I did both of those things today and they had no effect. I started up the computer and stepped away from it for a while, and when I returned the monitor was again not picking up a signal from the G5. The screen was black and I had to manually shut down.
It's strange. The G5 works with other monitors, and the Viewsonic works with other computers, they just aren't working with each other.
I have a Power MacG5 behaving exactly the same way with a large Westinghouse (LCM.22W) LCD Monitor. The problems began when I decided to enable the sleep function to save electricity. For years it worked fine and the sleep problems into an unwakable black screen started on and off with me doing the same to remedy it: restarting or unplugging and replugging the DVI 400 cable (Monster Digital Video)from the CPU DVI port. Now nothing works as a remedy. I have no alternate monitor to use to access the CPU. Now when I reseat the DVI cable the monitor says check connections indicating it isn't hooked up to a DVI output video source even though it is.
I'm starting to wonder if the problem is the G5 video card in the CPU and not the cable or the monitor since I'm not the only one who has experienced the problem with a large monitor when the computer goes to sleep and the monitor shuts down.
The PRAM PMU reset maneuver looked like it didn't work at first: black screen but there was no prompt saying to check to see if output device is connected. So, just make sure the PRAM PMU reset had truly failed, I unplugged and replugged the DVI cable in the back of the CPU. Voila, the screen lit up. The support document said that all peripheral device cables should not be connected when resetting PRAM PMU. But in this instance, reseating the DVI cable after the maneuver worked to get the DVI signal to the display. Thanks so much, kmac1036.