There is a red warning light on the dash of my brother's TN65D. It's upper left of center and it looks like a ! surrounded by a circle with ( ) on the outsides of the circle. I can't find any info on what that light means and why it would flicker. I can't find a copy of the owner's manual online. I can't even find a picture of the dash panel online. Any help figuring out what's causing this would be appreciated.