Sony Support USA

Good afternoon!

This is Kevin Krause from Sony Support USA. I am sorry to hear about the popping sound that you are hearing when changing video inputs on your TV. To help resolve this issue, I would suggest visiting Sony's esupport site for your model, which is http://esupport.sony.com/US/p/model-home.pl?mdl=KDL46V5100&LOC=3#/howtoTab. This site will provide you with some helpful troubleshooting tips and will also provide you with the opportunity to setup and evaluation with an authorized service dealer to help determine what the problem is that your TV is having.

Thank you,
Kevin Krause
Sony Support USA