If your guitar amplifier suddenly has stopped producing volume or any output whatsoever, there are a few standard procedures you should check.
- If it’s a tube amp, have you checked the tubes? Both preamp and power amp?
- Is the speaker blown?
- Are all internal cables connected if it’s a combo amp?
- Have you checked all your cables properly? Are you sure it’s not the guitar?
Once you’ve eliminated some common sense starting points, it’s time to either take your amp in for repair or possibly get a new one.