Did I Brick my Arduino Pro Mini?

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the pro mini showing dead short ground on vcc pin...  common failure mode?

i've been working time arduino pro mini run stepper motor.  circuit has been built on 2x2 solder-proto board, , been working well. realized overpowering lm7805 putting 24 volts (from stepper supply) - dumping 19 volts makes maybe 3 or 4 watts rid of...  bit much!

so went 12vdc wall-wart provide input 7805 - seemed go in process of powering new setup, noticed 7805 hot!   didn't make sense, began tracing lines (with 4x mageyes view details) , found after removing wiring 7805 , vcc lines on board - vcc pin on pro mini still shows short ground.  i'm clipping black lead of ohm-meter heatsink of 7805 - access boards ground system - , vcc pin on header showing dead short...    did brick little sucker???    =(

can't find solder bridges or other bad wring - , has been working several weeks.  seem i've done in installing new 12vdc supply has done...  something... not sure what!

=alan r.

dead short?  did measure resistance?  metal-to-metal shorts tend well
below 1 ohm, melted semiconductor higher.

first careful visual inspection - takes 1 little stray piece of metal wire
in wrong place short things out.



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