Had to think about this one ... so many choices! Well here's some genuine stupidity for you:
Was troubleshooting an amp that I had built myself completely from scratch. Somehow I connected the output test leads back onto the meter that I was using to monitor the input. Powered on - went into total oscillation, & then kapow a cap exploded. I was so royally ticked at myself!
Turned out to not be so bad after I decided to gut the whole thing then redesign & rebuild it. The result was quite rewarding.
Was troubleshooting an amp that I had built myself completely from scratch. Somehow I connected the output test leads back onto the meter that I was using to monitor the input. Powered on - went into total oscillation, & then kapow a cap exploded. I was so royally ticked at myself!
Turned out to not be so bad after I decided to gut the whole thing then redesign & rebuild it. The result was quite rewarding.