jvc lt-47x788 - no display, no menu

Hello I have a jvc lt-47x788. It was working fine until today. Yesterday I tried something new by connecting my computer to the LCD with a HD prot in the LCD and a DIV port in the computer. It worked fine, and LCD was displaying everything very well. Today, when I tried to start the LCD, the JVD logo came up, and then there was a sudden pop noise, and then everything went blank, no menus, nothing. I disconnected everything from the LCD, and tried to start it again. Same problem What could possibly be wrong. Thanks for your help REgards -Asif

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