Hello all, Bought a non-functional PowerMac G5 off ebay recently. Advertised as having a HDD failure. Managed to get Leopard 10.5.2 up and running on it by installing a new hard drive, with a partition containing an image of an old Leopard disc that I no longer have. Seemed to be running well, until the 10.5.8 update failed spectacularly and now I'm stuck in boot apple: logo; spinning cog). Can't get past this. Things I should point out: - Boot command key combos don't seem to work (mostly); might be because I've only got a wireless USB keyboard to hand though. - Red light on the motherboard on switching on and shutting off (with power button). Not entirely sure of the significance of this. Didn't seem to be a problem, since I did have it up and running. - From what I've read, think it might be the PRAM battery. However I cannot, for the life of me, find it anywhere in the case. It's in neither of the locations shown here http://support.apple.com/kb/HT1305. - 2GB of ram in the slots, only 1.5gb showing, even though they seem to be seated correctly. - It's a G5 2.3GHz Dual - It was damaged in transit. The 'feet' sections of the frame totally buckled, but I decided to just straighten them out because it wasn't really worth pursuing the compensation for if I could still get it up and running. At a loss. Going to try a reinstall of the OS if I can, other than that, I'm not sure where to turn. Want to avoid the Apple Store because a. I can't afford it, and b. this thing is hellish heavy. Any help very gratefully received!