I have had this receiver for a few years now, bought it new. Searched for a similar issue and found a thread where it pops and cuts out intermittently but mine never pops, only cuts sound out and will randomly come back a few seconds or minutes later. Never had any issues until recently. Sound on any channel cuts out randomly and comes back. Tried the factory reset and didn’t help. Seems like once it is on for a while it will work better and not cut out sound. Not much of a guru when it comes to this but I really don’t want to buy a new receiver but I know the cost of repair may be just as much. I have grown an attachment to this one which may sound odd but I like it. Any help is greatly appreciated. Mine is a vsx-522. Not a 522k..I guess it autocorrected to that. Not sure if they are the same, just stating that.