Sanyo HDTV Vizon TV - Screen Black, But has sound?

My television has been fine for years, but just today, my TV's screen is not displaying the image. But luckily, it still has sound. I dont think that image is totally gone, because I was pushing buttons on my remote, and it flashed the screen image a few times here and there. How can I fix this? TV is a Sanyo HDTV Vizon. 30 inch i think.
 
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