Rats

So the previously posted code was working well on the breadboarded version of my project, so I started soldering it into a more permanent form. All was working well until I tried to add a volume knob to the audio output, and now all I get is a loud hum in the speaker when powered by AC, and the arduino just dies when powered via USB. The MP3 board does not respond at all now, and I fear I may have fried it. Thank goodness I bought two of them. Now to try desoldering the module…