Rav Avigdor Miller constantly said (and can be heard on many of his tapes) that by someone having a television in the home he will lose his chelek in Olam Haboah.
It is well worth listening to these tapes, available at many Torah Tape libraries.
You can listen to one such time by CLICKING HERE.
To quote: “No question, anybody who has a TV in his house should know beforehand that his life is wasted. He has no chelek L’Olam Haboa. No question at all about it.”