Sony kv-AR34m36 TV picture distored

[kakulo]

Hi, thanks for reading. My Sony kv-ar34m36 tv had picture distortion problems. The picture starts to bend down from the middle to the left of the screen. it is more obvious when the pictures got a horizontal line across the screen, I can see the line bended down from the middle to the left side of screen. it is not a sharp cut off, it is a smooth bend. can someone please help me with this, how can I fix this problem? thanks for reading again