Hello! I have a G4 cube, 500 MHz, 1.1 GB RAM (installed 7/02), running OS 10.2.6. I just added an external 1.2 GB hard drive using a 6-pin firewire and after about 1 week the unit started freezing upon sleep mode (I only put the display to sleep, not the HD). At first it would re-boot OK but eventually it would give the grey apple and rotating circle that would go on forever (2 minutes) to either a grey screen or a blue screen forever. I ran Norton off of the CD and it found some thread problems, bitmaps, etc. and fixed them. I re-booted and lo and behold - stuck on the blue screen again. I ran fsck and it found invalid thread data and incorrect colume number that I could not remove by re-running fsck. I tried booting Norton or Jaguar off of the CD (think it is a CD/DVD but have never used the DVD) with no luck. Took it to a local store and they replaced the HD. Booted just fine this AM then wanted me to update the OS 10.2.0 they put on. I did so to 10.2.6 and also updated iPod, new iCal, etc. from software update. Re-boot and.....you guessed it....the dreaded blue screen! I then tried to re-load Jaguar off of the discs. Made it part-way through disc 1 and had to go to a meeting. When I returned it would not wake up. Is this the dreaded Cube power supply to the CD/DVD problem? What are my options??? THANKS SOOOOO MUCH!