Music Thing Electrophone: Troubleshooting - TomWhitwell/Electrophone GitHub Wiki

#Troubleshooting

##Before doing anything else

• Take a break, ideally overnight. It might be something really obvious (on breadboard, I've often torn up a circuit that wasn't working, before realising the power wasn't switched on)
• Check the soldering on every point. I sometimes tack one pin on a PCB socket, then forget to do the rest, which gives lots of spurious inconsistent problems
• If you can face it, check every resistor value
• Check the orientation of every diode, transistor, LED and IC
• Have you installed the ICs?
• Have you loaded the Radio Music firmware (the hex file) onto the Teensy?
• Are you using inputs as outputs, or vice-versa? (This is a classic guitar pedal building mistake)