okay so ive had my ad30 for about a year now. id say 3 days ago the sound would start to fade out and sometimes cut all the way off. i thought it was my cables but i tried them onto another amp and they were fine. but then yesterday when me and a few buds were jamming i lost all volume. i cut it off and waited then cut it back on then still nothing. there was no loud popping noises it was just fading out and now nothing. is it the tube? oh and it also broke the same day i got it that was the chip and i blew a speaker.
change the tubes, see if that helps.
probably the tube. you'd have to try hard to blow the speaker without pedals.