Memory Problem

[qanda]This thread is about the AOC L32W761 Lcd Tv. Click here to see full specs[/qanda]Have over the air ant. Scaned in 80 some channels. After a week or so when I turn on the TV it tells me to do a new scan. It appears to be losing its channel memory. I do a rescan which takes about an hour, N<E<S<W< and then it works fine for a week or so and then loses all the channels again. I have the unit on a APC system so i’m not getting power bumps. Do these LCD TV have a battery to maintain the memory chips? The unit is only three months Old.