Ok so I swapped out PSU's and the LCii did not start up. So I put the other PSU back in and it still did not start up. Fan spun, HDD spun up but that's it. So I unplugged the HDD and then the machine bonged and screen came on. Turned it off and plugged in the HDD and started it up. It started up this time fine. However I did not notice the screen moving when noise. I don't know if its because I had it hooked up to a CRT monitor this time and last time it was an LCD monitor where I saw the movement with sound.

I will put it back on the LCD screen later and see the results but I do feel you are right Elfen as I feel its the PSU that is defective. Do the LC and LCii use more power than the LCiii and LC 475's by chance? The borrowed PSU was from an LCiii even though they looked exactly alike.