The LG Tech showed up today and took the TV away. He said that because the "red and green sparkles" would show up all across the screen when it was showing black, that the only solution was a new panel.
He said that up to a few months ago LG would just replace the TV, but they no longer do that (one reason he gave was tax issues??). I asked about him taking a picture, as others have mentioned here, but he said that if he determines the TV can not be repaired onsite, then they have one tech at "the shop" who only repairs LG and he always videotapes the screen and sends the video to LG. He estimated that it would take about 2 weeks before I have the TV back. He said that if I only had the "sparkles" in a small area of the screen, they would have attempted adjustments to the "DC voltage" or replace a "Control Board". But he said getting a new panel, which includes "new electronics”, is best. Basically he said I will have a "new" 2006 model TV.
It was the tech's 2nd "appointment" of the day, and he said that he had 7 more scheduled.
The 2 year warranty expires today (I contacted LG last week for a LG "case number"). Lucky, because the tech told me that LG has recently got "very picky" on warranty expiry dates, and that he had a case where it was only 1 week past the date, and LG refused to cover the repair bill – he thinks they eventually settled for partial payment to demonstrate “goodwill”. The tech never even asked to see my original receipt or warrant info (he had a printout that already included all of that information, including where the TV was purchased - probably the info was from when I originally registered the purchase and warranty with LG.
Let's see how long the "2 weeks to repair" really takes. Luckily I have a 37" Toshiba LCD to move from the kids TV room to the family room.