I've got a dead circuit in the garage which worked fine until I plugged in a
new-to-me tool and apparently shorted the power switch to the machine base.
That created a noticeable spark at the tool and instant power loss to that
outlet. Unplugged the tool, popped downstairs to the main electrical panel
and reset a tripped breaker. Back upstairs but still no power to the outlet
or one other nearby.that is apparently on the same circuit. I turned off
all of the circuit breakers that were likely to power the blown circuit and
pulled the duplex recptacle ffrom the wall for inspection. It has two black
wires on the hot side and two gray wires on the neutral side. Ground is
apparently supplied through the conduit. No evidence of arcing or damage to
the receptacle and there was 40 M-ohm resistance across the hot and
neutral terminals. The receptacle was replaced with a new one, just in
case.

All of the circuit breakers were turned on in the panel, but there is still
no power to the outlet - voltage across the hot/neutral terminals is around
1 VAC. I checked all of the breakers again and they are all in the on
position.

I'm perplexed - what might be causing the problem?

Mike