I have the same TV & received the firmware update via email yesterday. My file was called AllCompBase.bin it's a 2.8m file. I loaded it to my formatted thumb drive and verified it was there. I turned off the TV and plugged the drive in the usb port. When I turned the TV back on nothing happened. I tried this several times. I called support back and the guy told me "maybe your Comcast remote is faulty". How in the hell could that have anything to do with this. Anyway he claims he's sending me a thumb drive with the upgrade pre-loaded. I cant see how this will make any difference but I guess I have to wait it out..........