I'm not aware of a firmware update for this particular model. The support portion of the website doesn't list any either.
Are you having problems with your unit?
If you register online and you're still within warranty, you may be able to extend the manufacturers warranty an additional 3 months. Just a friendly reminder.
I purchased this TV just shy of a year ago. I happened to come across a few posts talking about how the TV would go blank for a few seconds, but still be playing sound and working. Some mentioned this was fixed via a firmware update, but I am unable to find it anywhere in those posts or on the Samsung website.
Does it really exist? Where can I get it?