Hello, I'm new.
I have the exact same problem. The keyboard detects fine, the trackpad works and all plugins work--but I can't type. No buttons work, not even caps lock.
I ordered this off Newegg because they had a deal to get both tablet and TF300 in a package deal. I like the tablet itself.
I took it to Office depot and tried it out on another tablet--it worked just fine, albeit that one was on ICS and had android keyboard on. (this one auto updated to JellyBean). I don't see any physical damage to the brand new tablet and am hesitant to ship it back. Factory reset didn't work and cold boot gave me a red ! error and froze. Should I root it or look for another upgrade?