Originally Posted by Otto Pylot
^^^ I have the 47LD520 but never bothered to upgrade the firmware. I could never get a coherent answer from LG other than it "enhanced picture quality". Pressing LG they told me that all the update did was keep your settings so that when you turned the tv on, your picture adjustments were there instantly instead of settling into them during the warm-up phase. Seemed vague to me so I opted not too. I'm assuming you have the US version because the LG firmware updates are very model specific. Give LG a call.
Called up LG, they want me to take it in for service, and it is out of warranty. They say that IF the service center finds that the problem could be related to or aggravated by the updated firmware, then they MAY choose to help me out with the cost of repair. Of course, I would be out at the very least the money it costs to have the problem diagnosed.
Oh well, the problem is intermittent anyway,and seems to mostly disappear as the TV warms up. If/when it gets worse, I'll bring it in and see what happens.
LG said it is impossible to downgrade firmware on the device, as the TV will only accept a newer version of the firmware as an update, and will not accept an older version under any circumstances. I guess I'll update the next time there is a new version, and see if that helps.