Hello. I bought a Marshall Code 50 two months ago used. The first days it was working perfectly, but now, whenever I want to play some guitar with the amp, it stops sounding out of nowhere. I assume it has something to do with the headphone out, assuming that the HP OUT cuts the signal of the speaker. Has this happened to anyone else out here. If so, how did you guys solve this issue?

PS: The firmware is updated ;)