This thread reminds me of what happened to my MDD Dual G4 back in 2005. My Mac was still within AppleCare and It was having the worst Kernel Panics. After several weeks of dealing with AppleCare over the phone they told me to goto my local AppleStore. They looked at it and said they would test it and keep it. Seven days later I got my MDD back and what did they do? Replaced the Logic Board, Dual Processor Card, Video Card, & Power Supply. What was the Cost $1400.00. And I did not have to pay one penny. Fast Forward 2 more years to 2007. This time One day out of the blue My MDD dies and there is nothing I could do get it to boot up. My AppleCare ran out the year before and I was scared. I went to the AppleStore again and asked one of their Genius' what to do. They took it overnight and next day called me and told me it was the Power Supply had died. Being Sarcastic I was Like, OH REALLY?!. I could of told them that. Asking how much would it be, It would of been $200+ for a Power Supply and Labor. I was floored. Not knowing what to do and having very limited money at the time, I asked around. Another Mac Friend of mine told me I should get Apple ProCare. Essentially its some Overpriced Apple VIP membership thing that costs $90 a year. So I bought it. and Took the MDD back to the AppleStore, Showed my Apple ProCare card and all I had to pay was some $20+ for Labor cost of the Tech swapping out the Power Supply. I found out later that the Apple ProCare covers costs of Parts costs or something. Paying $90 for the membership and $20 for some Labor cost was cheaper than $200+ for me at that time. I am lucky that My MDD is humming along decent now since 2007. What I do now is I do not overtax it internally with new doodads and drives, cards etc. I keep the Minimum I need to work. Instead of 4 or 5 Internal HD's I have the Boot Drive (the Seagate 80GB that came with the MDD), an Applications drive (a Serial WD 120GB HD) , and a Data drive (another Serial WD 250GB HD). I keep an external 1TB HD for backup purposes of my MDD and my other computers. In my expansion Cards I have the Video card, a Serial SIIG card, and a 5port USB2.0 card. All my external devices: the external 1TB HD, my Canon CanoScan, my Canon Pixma printer, a USB2.0 hub, and a Flash card reader... I turn off or unplug when I don't need them. I am sorry you are having so many problems and I hope you have success in finding a solution. Peace, Luke Rademacher Liquid Zone Graphics Mac mini 2.0Ghz Intel Core 2 Duo, 3GB RAM, 80GB HD, Combo DVD/CDRW, Mac OSX Leopard 10.5.5, ext NewerTech miniStack w/ 320GB HD. MDD Dual 1.25Ghz G4, 2GB RAM, 250GB/120GB/80GB HD's, 16x DL DVD±R/RW Superdrive, Mac OSX Tiger 10.4.11, Classic Mac OS 9.2.2. External 1TB HD FireWire 400 Intel Celeron 2GHz, 1GB RAM, 80GB HD, Ubuntu Linux 8.04 5.5th gen 80GB Enhanced Video iPod Canon CanoScan 8400F Canon Pixma iP4500