Flex it. If it clears up try a shim, like card stock or something to keep the pressure on it.

Sometime it is hard to discern if a fault is in the panel or the Tcon, but in this case it is in the panel. you might have to loosen a screw or two and stick something under the panel to stress it and keep the connections alive.

Also flex all those little ribbons, they might be hard to get at but most of them have COB (chip on board) and sometimes that is what you need to stress.

It is is all you can do other than sell parts. You might be able to get Shopjimmy to buy them, or you can put them on eBay. At least you can say you know they're good.