Last night I was watching TV and the picture started to turn red, and after a period of about 3 minutes, the picture was completely red. Soon after that the tube turned off and an error code was blinking. I unplugged it for about an hour then turned it back on, only to find the same problem. It seems one of the color guns isn't firing. I called my dealer (TV is less than 1 year) and they can't look at it till Oct. 4th! Any ideas what this might be?