If you can make out the FM stations call letters, you might call them and explain your problem. An engineer may be able to help you out with the type of filtering you need for their freq. I have heard of this problem, if you live very close to a radio antenna tower. In some cases it can`t be filtered out.
Question, are you using external surround speakers hooked up to your tv? If so disconnect them from the tv output terms and see if it makes any difference thru the tv speakers.
wish you the best,Jim
Question, are you using external surround speakers hooked up to your tv? If so disconnect them from the tv output terms and see if it makes any difference thru the tv speakers.
wish you the best,Jim