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Its most likely an issue with the audio out IC . Most parts have been discontinued for that model but if you send a email request for assistance to [email protected] they will help and they should have the audio IC available for that model.
It was probably my post--SD TECH--you may want to tweek the red screen a little up or down--if it still acts up it is the picture tube--
The adjustment procedure is only meant to help and not cure the problem--try to get it as good as you can and live with it.
I have been involved with replacing those tubes and it is no picnic--you remove one--send it out for rebuild and put it back and do major adjustments--usual cost for rebuild is near 300 JUST FOR THE TUBE--real problem is that sooner or later the two other tubes will start to act up.
I composed those instructions to try to give people an option--to buy them some time--the picture tube is what some call a bulb--one in the same thing.
Lots of these sets had all three tubes changed when under warranty--what really happened is Sony put the wrong tubes in the sets to begin with.
My best advice is adjust it as best you can and when it goes replace the set.
The red picture tube has an internal short. Hitch is that the tube is no longer availible. But the tube can be rebuilt. A tv shop can pull the tube assembly and ship it off. This is a very reliable repair but expensive. Average cost is between $400 and $500.
There is only a few reasons for this problem and it is a bad video IC on RED CRT board or Defective RED TUBE disconnect CRT board at end of neck on red tube Look at IC on That board while disconnected from tube turn TV on if it keeps playing without shutting off Tube is defective.
When ever a tube starts to short or is shorted set always will have over bearing drive lines then shut down like RED if it was bad, set would come on long enough for red lines across set then shut down this is the same with all 3 tubes.Also if you think it might be green tube disconnected green CRT board on neck of green tube if set comes on and plays then it is green tube do all 3 tube this way one at a time this will tell you if you have other problems.
I hate to be the bearer of bad news, but you have a shorted red picture tube.It is not at all uncommon on sony rear projection. The gun shorts and the set identifies the problem and goes into shutdown. Usually there are diagonal lines in the picture before it shuts down. this is an unfortunate problem because this set delivers a great picture. The dealer cost of the tube is around $200. When the repair is complete your're probably looking at $400-$600.
The only problem is that the green tube and the blue tube also have chance of having the same problem. It'a tough call . But from my experience , I have replaced the green tube and
had the blue tube goe within a year. Scrivitron