The images on the screen suddenly went very dark. You could barely see the images, but looking closely could see they were there. I increased the backlight, the brightness and the color adjustments and the picture looks much better. My question is, how long can we expect the TV to continue operating with these greatly increased adjustments?

The television was purchased on March 10, 2010. I realize TV's don't last like they used to, but am hoping this one is good for a while yet. Please advise...

Thanks