I bought my first general Mac Pro in 2007. One week ago, when starting up the computer in the morning the screen would go crazy with flashing colors. Eventually, I could get it to boot up but only after 5 or 6 times. Now, it is impossible. This computer is used primarily for a small recording facility with a Digi Board and Pro Tools 7.1 installed. Here are the specs on the computer: Mac Pro Dual Core Intel Xeon 2.66 GHz Processors: 2 No. of cores: 4 L2 Cache per processor: 4 MB Memory: 2G Bus Speed: 1:33 GHz SMC Version: 1.7f8 I'm running OS X 10.47 I've checked the Log folder and can see multiple kernel panic attacks but I think I may have been the cause of it. I happened to be holding some old photos that I had taken and saved to a cd back when I owned a very early version of Photo Shop. I loaded the photos onto my desktop from my CD and then downloaded a sample version of Photo Shop CS. Well, ever since then the computer has been totally wonky! Shame on me as I forgot to do an uninstall and just dumped things in the trash and probably missed a whole bunch of extensions and plug ins related to the program. Nonetheless, just to be sure I do not have any hardware issues, I rebooted from the original CD holding down the D key and did an extended test on hardware. The prompt tells me that no hardware problems were found. I then rebooted with the CD holding down the C key to use the disk utilities and disk repair and proceeded with verifying the hard drives and doing a disk repair on the first drive. Upon rebooting in a normal mode, I find that the screen still flashes crazy colors and ultimately freezes. My next approach has been to reboot in the "Safe" mode and here I find absolutely no problems with the monitor, or flashing colors and can run the computer for many hours. Can't use it to record as I'm aware that most of my extensions are disabled. I am running Mac OS 10.4.7 as my Digi Board is running on Pro Tools 7.1 and I purchased several plug ins that I don't want to interfere with if I were to upgrade my operating system. That plus the cost of buying upgrades for the Pro Tools plug ins to run on a higher level OS. Runs just fine on OS 10.4.7 anyhow. So my query here is: 1: have I missed anything? 2: do I need to look at my video card? .... anything else. I am dreading having to reformat the hard drives and reinstall all of my software for my Digi Board and Pro Tools. A tedious process. And yes, I have back up on everything. Many thanks for any input brighter minds than me can supply!