We've got an annoying ringing noise on many SD stations. It appears most often with a bright picture. It doesn't appear to happen with HD content or with content from another source through the same receiver and TV (I.E. Chromecast or AppleTV).
Has anyone else seen this? Do I need to replace the receiver?
Perhaps it's not a problem with the STB, but rather the settings on the TV. I remember that with CRTs if the brightness was set too high and a bright picture came up, or if there was writing on the screen, the TV would "buzz". Here's an FAQ on proper TV optimization. What's the make/model of the TV?
Thanks 57. It's a 50" Panasonic Viera Plasma - I'd have to check the model. I've used DVE to help optimize the picture, but will have to double-check to make sure nothing has been reset. I remember that issue with CRTs, just didn't think it applied to flat panel displays.