You may have NATIVE resolution set, and even changing channels can cause the blinking with different resolutions. Press format button on the front of the Tivo Premiere to cycle to a FIXED 720p or 1080i resolution and the blinking is reduced.
Original S1 (Recycle Heaven)
Series 2 (PLS, sold)
TiVo HD (XL, PLS, "652")
Juliet Basic (4XL, PLS)
The TiVo Apocalypse begins on Sat 2013 Feb 16 00:00 GMT!