I don't think it is a bad solder. I returned the first TV since it was doing this within the 30 day period. The second identical TV acted the exact same way. After that I set up a dedicated outlet with only the TV on a breaker by itself. This did nothing for the problem. The voltage regulator finally fixed the problem. Like I said, the flicker might happen once per month or two. The APC doesn't have a battery inside and so it can only store up power for maybe a split second dip in voltage and still maintain a consistent voltage to the TV. So what I am probably noticing once per month is a slightly longer dip in voltage that the APC cannot keep up with, and I get a flicker. If I spend approximately $1000 to get the APC with battery back up built in I bet it would completely solve the problem. But, the problem that I still notice is so rare that it doesn't even bother me now.
