Can my TV be fixed?

I own a LG TV which works also as a computer monitor (it's a led LCD TV, model M2252T). I've owned it for four years and it has worked flawlessly before.

Today when I was on my computer, I suddenly started to smell burning plastic and then I noticed that the screen was turning black from the upper left corner. I quickly turned the TV off and unplugged it. When I later tried to turn on the TV for a while, the screen was working but the black part in the corner had changed colour into a bright light.

Can my TV be fixed and how expensive would it be to have it repaired? It's an old TV so I understand that it might be easier to just buy a new TV but I would still like to know if there's a chance to get it fixed.