I have a Panasonic rear-projection HDTV (model unknown). Lately, the picture has gradually been getting darker and darker. In night scenes the action is virtually invisible; it's all black. Daylight scenes are dark, too. Manipulation of the picture and contrast and brightness of the TV makes little to no difference.
Is this a sign of the projection bulb burning out? I thought when that goes, it was a sudden failure. Or, is there something wrong with the set, which needs to be seen by a serviceman? (The set is about 4-5 years old.) Or, is it time for a new TV? (I secretly hope it is the latter; I would like to upgrade, and need an excuse.)