Hello, I just purchased a used Powermac G4 (MDD) from eBay. When I connect it to my LCD monitor (via a DVI to VGA cable), the screen goes completely gray. I am somewhat disappointed since I've been waiting for this machine for quite a while. I tried most of the common troubleshooting tips (Holding the Shift key during startup, zapping the PRAM, trying a different set a keyboard and mouse, and even starting it up with no keyboard or mouse) and there is still no go. Also, sometimes it doesn't even start. So, I have to switch outlets. Any help and suggestions are greatly appreciated!