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How many times do this standby/power light blinks at one time switch ON? Count it. These blinks are fault indications, and are called blinking codes. By this number of blinks, you can get an idea about the faulty circuit stage inside the TV. If you wish to get more details about these blinking codes, check the site linked here. http://electronicshelponline.blogspot.com/ Pull up previous posts there, either by its
left side bar, or view it in Timeslideoption.
Blinking of standby LEDs to Sony TVs are fault indications. Form the number of blinks occur at one time, the repairman can get an idea of the faulty stage inside it. According to you, it blinks 4,6 & 7. Just visit this site, It has details about blinking codes to Sony TVs, both CRT based, Flat panels and Plasmas. I can't provide more advice to you, because the number of blinks are not constant. Check the site, and get it.
1. The TV remains on, yet there is no picture and no sound? Or does the TV turn off altogether? 2. Are the blinks constant and continuous? Meaning, does it blink two times, pause, blink two times and go on and on like that? 3. Can you turn the TV on? Or can you not get it to turn on?
Answer those questions and I can give you some more information or send you to the place where you can get it.
Guess I should have looked throught the next couple of posts... The problem you have there you will not be able to repair yourself but a good shop can fix it temporarily. The CRT (Cathode Ray Tube) or picture tube is shorted, that's what is causing your blinking. You can call around and ask a shop locally if they can rejuvenate it for you using a crt analyser. In the shop here we use a BK467 which would fix the problem for awhile. What they will do is take the back off and hook-up the analyser and remove the short temporarily. That fix could last weeks or even months, in most cases though never more than a year. Turn the RV1791 back down, it has nothing to do with the G2 voltage and you don't want to overdrive the crt anyway. Take it back down until the horz. lines disappear in dark scenes or background. Then take it in and have the picture tube rejuvenated. Then start shopping for a new Tv... You'll need one eventually but this will buy you a little more time.
The 7 blinks indicate a high voltage shutdown (high voltage exceeded 33,000V). This is usually caused by a defective regulator. Could you please post the exact model number (KVxxx) and I'll look up the part you will likely need?
First, Have your tv 's circuitry be resoldered. this might be a case of loose contacts particularly along the crt circuitry. the longer you operate the unit at this condition, the faster you are counting the possibility of shortening the lifespan of your tube. 9 years is quite a young age for a unit which has an average of 18years.
Sounds like the high voltage is marginal.
My experiance is to not put money into a TV that is over ten years
old. TVs stress out their electronic components worse than almost
any other electronic product. After 10 years, there are so many
parts that are ready to fail that your are probably wasting your money
trying to get any more life out of it.
Another option is to wholesale replace the main board by sending it to Module Exchange at 972-298-1212,
or PTS Electronics 800-844-7871 ptscorp.com.
Be careful on buying a new one though. Often times, these new
technology ones are much worse. Always Google the model number of
the set you intend to buy and add the word 'repair' or 'complaint' to
see if it is one of the many models that are customer service
nightmares being produced by even the most reputable companies today.
Hope ya fix it!
as sound is ok means power supply is ok.
1 check for filament if it is glowing means it is ok otherwise check for its supply.
2 check video and crt pins voltages
3 check for connector loose
4 luminance section in chroma ic.