Has your problem been resolved yet. I am having the same problem but when I contact samsung it is a known problem but they apparently don't know the solution, although they insist with certiantity that it is not a software problem. So i was wondering if you were able to resolve the problem yet.
My Samsung Smart TV no longer displays letters or numbers in any of the menus or interactive controls. All the menus work ok, and the TV is fully functional, but instead of displaying text, it's just blocks (looks like barcodes).
As with all of these things it was fine last night, but just started this morning.
This is evident in any of the Samsung specific menus.
Has anyone seen this before? I was contemplating using Samsungs remote assistance, but of course I am unable to read the 8 digit log on code.