I have a Mitsubishi Medallion rear projection HDTV. We lose the signal to the TV from all devices, cable, dvd, surround sound. Turn the TV off and we gain signal again for a few minutes before it happens again. It is not the devices because through the surround sound we can still hear the signal, meaning audio from what we were watching. We had this problem repaired once before under warranty but that has expired and don't want to get ripped off.
Have you fixed this problem yet?. I seem to have the same issue.
On the signal board there is 4 surface mount transistors. There is one
right by the input board (BA09), i would check the corresponding caps
and diodes close to it also. I would replace all of the 4 transistors.
If this SMT starts to go you will see wavy lines in your picture than
it will go away in 3 min or so and get worse over time until no picture
is seen. When it totally fails you will have no inputs what soever but
you will have an OSD screen and when you choose DTV you will get a
scrolling picture.
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