12 days ago I was working on my MacPro when it made an audible 'pop' and shut down.
Pressing the start button resulted in fan noise but no startup chime. After looking online I suspected the Power Supply Unit. I managed to find a replacement PSU (took weeks) but I've just installed it and it hasn't worked the oracle.
I've tried resetting the SMC (considering it hasn't been plugged in for over a week I believe this is simply a matter of starting the machine up again?). I can't use any utilities as the machine won't boot. Disk is OK, I can read files off it, etc -- the machine isn't even looking for a startup disk!
Anybody out there got any ideas? I'm getting desparate now -- this machine is my main workhorse!