toshiba 61HX70

We have a friend who was watching their Toshiba  61HX70 when the screen went squiggley (diagonal lines across the screen) then she head a low pop then the screen went blank. She shut it down, restarted it and the screen was still black although she still had sound. They shut it down, unplugged it, let it cool down, then plugged it back in and tried again. Same result. We took the covers off and looked for any blown capacitors but found none (that we could see). Looking for a service manual and advice.

Thanks,

Jim