Polarity - have I cooked my first build?

[antosaurus]

Hey team - been trying to finish my first build. First time around I got a lot of noise and no boost/Dirt from my pedal. Thought it'd be a ground issue (thanks to people on this board) so have rewired it up better.

This time around I got some effect! Along with a whiney hum - maybe from my mains out put - well that's what I thought. So to test, I wired up the battery to the effect (this was just an DC powered effect so wired up a 9v to plug of my dc jack using croc clips) and now I get nothing - not even the LED. Tested back with my normal plug and still poked. Have I cooked my effect - and if so, is it all poked or have I just broken say the LED because I reversed the polarity, and it'll come right if I swap that out?

My main issue has been with the off board wiring cos I'm a noob (see mess in pic) and want to get it right before I smash into the mudbunny.

Chur

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[bsoncini]

The name of the pedal you are working on would help. And if you have a multimeter some voltages.   And some pics too