First, are you able to disassemble and re-assemble electronics? If not make a friend that does.
These LED TVs are so easy to fix it's crazy.
Review the steps in this you tube video https://www.youtube.com/watch?v=vTshhd0l...
Remove the base / stand
Locate and remove the screws that are usually on the edges.
These is probably a screw or two on the rear panel where all the external cables plug in.
You should ensure that all the screws are the same type and size: you can sketch on paper and tape them to it.
The next steps require you to be extremely careful and patient.
Rarely does a cable able to be simply pulled out and back in.
Depending on the specific cable, there may be tabs to squeeze or have a hinged cover that requires a tiny edge like a razor blade to carefully lift it up.
Make sure there is no visible burnt spots on the boards and cables. If not then proceed.
Carefully detach each cable, one at a time and look for damage; if it's good then plug it back in.
Not knowing where you hit the TV with the zapper, you may want to pay close attention to the board the LED cable(s) plug in to.
There are repair kits that are generally pretty inexpensive, here are a few
https://www.shopjimmy.com/categories/bra...
https://www.ebay.com/sch/i.html?_nkw=viz...
There's no reason that you can't fix this, period, and at a low price.
It would be helpful for us trying to make a diagnosis if you could add a picture of what you're seeing on the screen so we can see it too.
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I'm not sure I agree with Jeff that it's going to be as easy to fix as they seem to think, but let's see what the damage is so we can try and figure it out.
- de Jerry Wheeler