A long-time Windows user, I made the switch about a month ago to a Power Mac G5. It's a dual 2.5, 1.5GB RAM, Geforce 6800 Ultra, 250GB HDD, Mighty Mouse (I can't give up my precious right-click), with other assorted goodies. Great machine so far aside from one nagging issue. I bought the machine from MacMall and it came with Panther installed. I ordered a copy of Tiger to go with it, and the first thing I did was wipe the hard drive and perform a clean installation of Tiger. Everything seems to be running smoothly, but for some reason it won't wake from sleep. At least as far as I can tell it won't. The monitors shut off (I have a mulitmonitor setup until I can afford the Apple 30"), but jiggling the mouse, clicking its buttons repeatedly, and hitting random keys on the keyboard repeatedly won't make the monitors come back on. Since the monitors aren't on, I can't tell if the machine itself is awake or not. I suppose the next time it happens I could try opening the DVD drive and, if it opens, inserting a CD to see if it plays. That would at least confirm it's a display/video card problem. Any ideas? I disabled sleep entirely in the meantime.