Sorry was out when you replied
Was close to suggesting the panel was the culprit but wanted to wait some until you could get a closer look .
When moving a large (or any lcd /plasma ) tv the best position if possible is standing up and if you have to lay it down then on its face lke you did but on a firm surface even if it is a piece of plywood ,just covered it with a thick blanket or sleeping bag for example and lay it down on its face
A car seat does not do as the screen can flex with road bumps , the important is to keep it from doing that flexing.
Wish i had some easy solution for you but you are correct then " it is toast "
As a rule of thumb the LCD panel cost around 80% of the original cost of the tv and then it has to be stripped down and rebuilt around the new panel and then again that is if you can find a new panel.
When under warranty most companies will replace the tv , not the panel.
If it does turn out that way then this makes the tv practically un-repairable due to the high cost and again that is even if you could find a replacement panel
If that answers your question please do not forget to rate so i get paid for my time helping you or you can use the reply button before or after rating if you have other questions , thank you .