LM386 guitar practice amp circuit not working, need help finding mistake
One quick thing to check is the wires that are soldered to the board. I've had this issue a lot when I first started making my own circuits. Although they will seem like they are soldered, sometimes they don't have a good connection and will cause issues like this. I would reflow all the solder joints and see if that works. I also recommend tinning the wires prior to soldering them into the board. This will help get a good connection.