Mac Pro 1,1 OS X 10.6 I tried to turn on the computer again - white power light came on but it didn't boot from the drive. It does not appear to be accessing the hard drives at all. I have removed all external USB sources and I still get nothing. i have tried removing all but the first(system) bay and it stll won't boot. No chime, no screen, no dark grey screen. I hear what sounds/feels like the two fans going full power but nothing that sounds like HDD access. This continues until I cut the power again. I removed the graphics card - all the drives and but one set of DIMM's with no difference. Fans still stay on full power until I cut power. It does show the white power light on the front though. I have reseated all the memory as well - cleaning off as much as I could witha 12oz can of compressed air. Still no difference I guess there is no way to run the Hardware Test in this stage. The logic boards Diagnostic LED's show "trickle power" That led me, and other apple "experts" to suggest a power supply problem. I bought a new one off ebay but after connecting it nothing changed Any ideas?