To eliminate interference on the wireless, try changing the wireless channel. Other wireless networks, microwaves, cordless phones and such can interfere with the wireless signal, even though you have a good signal strength.
Series 2 (PLS, sold)
TiVo HD 1TB (157 HD Hrs, PLS, "652")
Roamio! Oh, wait, Its Juliet!
OTA! OTA! OTA!
The TiVo Apocalypse begins on Sat 2013 Feb 16 00:00 GMT!