Television and Home Theater

So I recently replaced the lamp in my Akai PT46DL10 46" DLP set. What happens is I turn on the TV, after about 25 sec. of the power light flashing green the lamp turns on and I get a picture, the power light is then a steady green. The set operates fine for about another 25 sec, and then the lamp turns off, but I still get audio. The audio continues for another 25 sec or so and then it turns off, and the red lamp light and the green power light are both lit up solid. Also sometimes I will turn it on and the power light will just flash and then the audio will come on but still no lamp.

I have a 50" Toshiba TV. One, or more, of the speakers seem to fading in and out. Although it is more of an on/off type of phenomenon. Anybody have any idea of what it is?

i have owned and used model 43uwx10b hitachi projection tv for five years with no trouble. recently, when i turn it on, the red power led on the front of the unit flashes and there is a quiet clicking sound from within that keeps time with the flashes. naturally there is no picture or sound. the normal condition would have been a steady red led. does anyone have  advice?