Mitsubishi WS-65611 65" Rear Projection Television "signal att uverse" Questions

signal. I have no luck trying to change the setting on my ws-65611 from 480i to 1080i. Try connecting the dtv section of the TV and the result is still 480i. Just installed Att-Uverse. can anyone help

...ATT Uverse HD decoder box issue or ? The TV blanks-out for 1 to 5 seconds during commercials (some are informative!) and when a news show goes on-site to a roaving reporter. Weird! It's as if the TV ...