Onkyo AV receiver repair- TX-NR838 

i have same receiver, no video and sound output

I have one....great Receiver.....but I have a problem now, the front left speaker and the Right Surrond keeps poping (weird sound, like crakles) but only when voulme is at 70....and after 1 hour it turns off and goes into Protection Mode. Only if I reset the Protection Mode it turns on again....any sugeation of the cause? Thanks

I have same model, sometimes shuts off, when it’s on no sound! Any idea?

What was the issue with this?