I have a MacPro Intel G5, (OSX 10.4.11) only a couple of years old. I have been having a problem for the last few months only when the computer has been shut down for a while, on boot-up, (never happens on restart) I get the power light on and fans blowing and start-up gong, and either blank black monitor screen or two or three flashes on the screen showing the little monitor calibration box and then the gray/apple screen distorted by a kind of "fuzziness". Then it goes black again and a few seconds later the login screen comes on and everything is normal. Except for noisy fans making a kind of loud "scraping" noise, (really loud every half hour or so) like they have to be lubricated or something. Should I just ignore all this, or is my MacPro getting ready to die on me? Help?