Purchased E420VO television late March 2011. To be used with 'over the air' antenna system in super fringe area. Initial 'scan' of channels resulted in capture of two channels with my antenna directed towards one of four directions with usable signal levels. Subsequent scans, which (according to the manual) are to add additional channels to the master list, with the antenna directed towards one of the other usable directions yielded the channels being detected and added...but...the earlier channels are erased from the master list. This appears to be due to a programming problem with the capture routine. If one scans over a previously detected channel (from another direction) and no signal is CURRENTLY available (duh..the antenna is no longer pointed that direction) that channel is erased from the list!!@#$%. Vizio could take a lesson from the programming of one of their own other models which ALLOWS for the adding of other channels WITHOUT erasing prior detected channels!!! (MODEL E320VA) which I purchased at the same time and store! The problem is not insurmountable...one only has to scan each individual channel of the 68 available, record what broadcast channel ( 2 ~ 69) that each set of digital channels ( 6.1, 6.2, 6.3 etc.) is found on and make certain NOT to re-scan that broadcast channel number when NOT pointing the antenna in the direction where that channel was found! What IS insurmountable is when I have overlapping channels from different directions...There is a set of digital channels being broadcast from Des Moines, Iowa that is on the same broadcast channel as some channels from Springfield, Missouri. So, if I want to watch the ones from Iowa, I have to re-scan that channel number, if I had previously scanned it for the Missouri channels!

One person from Vizio "tech support", after being told I had an exterior boom antenna on a 75 foot tower outside my house actually had the audacity to regurgitate that "moving the antenna closer to a window would probably help! Good Lord, where do they find these people?!? That same person also made the statement that the t.v. was not intended to store the antenna locations...geeez looooeeeeze!!! I am NOT asking it to store the antenna locations...just the channel information so that I don't have to re-scan every time I point the antenna to a different signal source area!

Yet another case of the six P's...Pee Poor Planning Precludes Proper Performance!