I have a PN58C8000 that started Pink Banding about 1 year ago barely noticeable, then in the last couple of months it bloomed to rich purple/pink band that in a snow scene looked like a Barbie Dream house exploded on the inside of my screen (upper right area the most in a square). Contacted Samsung support, could not enter anything on the support site as the model drop down didn't work (I.E, Firefox, Chrome all tried). They first tried the does it display on the test image? Which is a blue background and blue drowns it out. Then a factory reset. Which knocked my wi fi dongle back offline and dropped all my settings completely out but no change (if you've had a calibration make sure to document all of the settings prior to a factory reset, it will lose them). At this point I pulled out the ASC20130528001 bulletin that was posted in this thread and said to the person on the call this looks exactly like my issue. They said O.K. we will arrange a tech. They had to hand enter the request and said someone will contact you within 24 to 48 hours and that you will have to pay for the tech call since it's out of warranty (purchased in Aug 2010 when it first came out) and any additional parts that might be required. Within that timeframe the SK electronics firm that does the servicing in my area contacted my wife and the tech was scheduled. He arrived had the printout of the service bulletin in hand and here is what he did....exactly what the bulletin described. Firmware update to Logic Board using Service Remote, changed the banding to very slight almost light / white. He then with my assistance turned the TV around and pulled the back off and adjusted to the recommended voltage, brought up the white test screen and fixed. He screwed on the back and we put it back in place and we are now up and running and very happy with this TV. I had been running the TV in Movie Mode in Warm 2 (with adjustments to make a darker picture to prevent the banding) but can now use the brighter modes since I live in the southwest where bright sunlight reigns supreme. Yes it was not a free fix but having done Computer Onsite calls, it was not unreasonable to pay the tech for a return to awesomeness that this TV has when displaying correctly. One thing to note if there is any burn in they may ask to replace the panel at $1K which is stated before the tech comes out. Thanks for AVS and everyone here, I was about to toss the TV, and instead am very happy with it now.