As bad days go, this is one!

[Plaz]

If you shorted just the power lines, then hopefully just a fuse in the power supply.  However it was always too easy to zap the line drivers and CIA chips on the 3000 mother board. I'd first try disconnecting the power supply from every thing except an old hard drive and see if it' spins it up.

Plaz

[Plaz]

Start out small when you start testing again. Bare mother board, no floppies, no HD or add-on. Quick on/off on the power supply to see if the power led lights ok. If so, then go for a longer test still with bare mother board. Watch every thing close for any unusual heat or noises. If any thing looks weird, shut down. Then on to adding drives and add-ons. After this kind of zapping, you don't want to move to quickly and have a bad part on the mother board back-fire and take out the new supply, burn a drive or even more parts on the  board. Tedious steps from long experience with reviving cooked systems.

Plaz

[Plaz]

You did forget one thing to watch out for.  Smells!

Ha, if you make it to smells you've likely already gone too far.
I keep fingers on the usual suspects. In this case the CIA's and 1488/1489 line driver ICs.
They'll usually fail in a short condition instead of an open. Rear right hand side of the 3000 if memory serves.
Hoping along with you that the power supply was the only casualty.

Plaz

[Plaz]

IT WORKS!!!!!

Excellent! The universe has balanced itself once more. Those old PS caps just couldn't take the shock and was time for new.

Plaz