I purchased an Origin 20H approximately 3 months ago. Last night, I was playing it at healthy volume and it rapidly lost all sound. Guitar plugged straight in to the input, nothing in the effects loop. All tubes were still lit. I tried different guitar chords, speaker cables, preamp tubes, plugging into different cabinets, different guitars. All to no avail. Any suggestions? I have had no problems with the amp before last night.
With regards to your ORI20H, it may be a fault within the power supply as it is still under warranty we would recommend contacting the dealer it was purchased from so they can arrange for it to be looked at on your behalf.