Hey Joe,
It appears we have the same problem with our techwood twp4210 tv's... strangely enough (mine has been out of action for a few months now, but) it seems mine lasted roughly the same amount of time that yours did, bought it for the world cup 2006... for the last 6mnths/year it has been sat in my hallway of my flat getting in my way, a great lump of metal, gathering dust......while I decide if I have just a large junk item to dispose of or a fixable tv.
I was looking for some hint of an answer on the net when I stumbled upon your question, lol, at last a hint of heading in the right direction I hope, as your fault seems just the same as mine...was just fine n dandy the night before, then, got up next morning, and the screen was dark, still see a slight picture behind the extremely dark pixlated screen, and, like yours, the sound is fine.
I was wondering if you had gotten anywhere with getting yours repaired?
Expensive for a disposable item isn't it?
Regards (fellow-sufferer) Lynne.
Lynnie The Minx, February 2010