I have a Sony STR-K1000P Audio Video Receiver and recently it stopped working and started outputting a high pitched humming sound when I connect the speakers. The sound does go away if I turn down the volume and will increase if I turn up the volume and is a constant humming sound. When I connect my phone to the receiver I can hear my music very quietly playing in the background however there is just the constant high pitch static sound. The receiver was working fine before and I went to play music one day and I encountered this problem. Anyone have a Sony STR-K1000P or knows what the issue is and if there is a way I can fix it?
Attached is a video of the system and the sound it is outputting when I turn on the speakers.