Hi. I have a Denon AVC-3020. I have 5x30W RMS speakers hooked up to it (main L + R, rear L+R and centre)and a 96W RMS independently powered subwoofer (connected via phono). When i first got the amp around a year ago, everything was fine. However, recently the amp keeps dying after around 5-10 mins, depending on how loud i have the speakers. I've tried running the speakers using simulated surround sound and tried bypass, but still the problem persists. Does anyone know why this may be happening? Any suggestions or comments would be helpful, thanks.