Facing TV Problems? Ask a TV Technician.
Hello, Sorry you're having problems. Unfortunately if there was water thrown on the screen (which always almost always leads to a failure), and the screen is gray- this does indicate that the LCD/LED panel of the screen itself has failed. It generates heat with the lighting that's inside of the panel, and a sudden change in temperature will cause the crystal in the screen to fail. To repair the set would require replacement of the entire panel which is 80% of what the TV cost when new. When we see this in a shop, the set is considered "non-repairable" as it would cost more to repair the set than it would to replace it unfortunately. I'm very sorry for the bad news here and wish there were a quick fix but the set would need to be replaced if any liquid at all came in contact with the screen.
The only small saving grace for this failure of the TV, without taking a complete loss on the set, is to contact a used/pulled parts supplier like: http://www.shopjimmy.com as they generally purchase TV's with failed screens to sell for parts. At least that may be a way to recoup a small amount of the loss.
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You're welcome and sorry for the bad news here. If you need further assistance let me know. Before you go, PLEASE DO click at least a 3 STAR RATING, at the top your screen. That is how I am credited for my efforts by the site.