I brought this tv about a year ago and had no problems, but know I noticed that I have to have the brightness adjusted at about 61 to get a good picture. I have a comcast hd/dvr box connected. Today I unplugged the set and cleaned the filter and removed the front panel and pulled out the lamp and tried to clear the dust from the little fan under the lamp itself, after doing so it got brighter and when I went back to the on screen guide it seemed to get a little darker. Any help would be appreciated. Also, does anyone know what the color temp should be set at or does it make a difference.