Toshiba 43H70 43" Rear Projection Television "interminable" Questions

My sony kdf 55e2000 rear projection tv picture and sound go out every couple of minutes, green power light blinks 42 times then the picture and sound come back. Does this religiously over and over ...

Flickering and focusing in/out picture including some sound spikes and red LED light flashing I have had this several years and had no problems until 3 years ago. It was the same problem or symptoms. ...

MY 50" DLP RCA picture goes on and off again. I still have sound, but it seems like it keeps wanting to reset itself. The lamp is only 15 months old! This problem is interminent. Some days not at all,