My father owns one of the original G5s, so its power pc not intel. Today while browsing an excel spreadsheet he says part of the screen turned black, then the monitor shut off, then the monitor came back on but not video. Mean while the fans started spinning out of control. Now when he tries to turn it on, he gets power, but all that happens is the fans spinning faster and faster and faster until he turns it off. No video or anything. Just speeding fans. He fears the CPUs died since they control the fans. Any suggestions? He also says the fans were spinning unusually fast these last few days.