Received HP-S5053 TV yesterday, turned on last night. A very loud buzzing noise came out from the back of TV, I can hear from every corner in the house. The character on the screen seems vibrate with the noise. I called Amazon, "No return or exchange, call Samsung". I guess Amazon lower its price to attract buyer and at the same time getting a lower cost from Samsung by shipping a defect TV to buyer. What a business practice from Amazon. *&#*