Hi everyone, I had a S2469 fail (POST beep codes) and ordered a new MB. When the new MB arrived, I installed it and attempted to power up the server and nada! Eventually, I determined the new MB was defective and ordered a 2nd MB. When that arrived I ran into the same problem - nothing happens when turning on the power! After checking everything I could think of, I stripped the original board of everything, plugged in the power and turned on the machine. Fans and hard drives start up. If I do the same thing with either og the new MBs, no power reaches the fans or hard drives. Other than the fact that the original board is Rev C and the new boards are Rev F, I can't find any differences (jumpers etc). It appears as if the PSU is being clamped down (is that the right term?) or the power circuit is open somewhere on the new boards. Any help, ideas, hints or moral support would be greatly appreciated. John Hayden