TV Repair Questions? Ask a TV Technician for Answers ASAP
I'm sorry you're having problems and I will try my best to help.
Unfortunately whenever these screens are impacted, or any external pressure is put on them it generally causes the screen to fail (the LCD panel has liquid in between two layers that produces the image). Anytime you see any defect in the screen after it's been hit- it does unfortunately indicate that the LCD panel is faulty and there aren't any fixes for this beyond replacing the entire screen of the TV (which costs 80% of what the TV cost when new, and requires dismantling and reassembly of the set to fix the issue). I'm sorry to have to tell you but the TV is not really repairable after there this occurs, aside from purchasing a used one of the exact same model on eBay and then disassembling it for it's screen. Other than that I'm sorry for the bad news and wish there were an economical fix.