Question about Sony FD Trinitron WEGA KV-30HS420 30" TV
I have a 3 year old Sony KV-30HS420 that turns off all by itself. The screen goes to green and the picture fades to black. The sound will keep playing for a few seconds then the TV will turn itself off. The Standby Timer button will then blink 6 to 7 times and keep repeating the 6 to 7 blinks until I turn the TV back on. The TV will turn off with and without being hooked to a surge protector. I carried the TV back to where we bought it from. The TV Tech could not get it to dulicate the probelm in the shop, 50 dollars waisted. The cable company has trouble shot all their equipment HD box, cables etc. The Tech concluded the cable is not the probelm. We even hooked another TV up to the HD box and other TV worked just fine.
This is less a solution than a work-around, but it does work for me, and it is free or low-cost.
I have had the same problem on the same Sony (model KV-30HS420),picture fading out to green then black, then turning off by itself,after which sometimes the light blinks 6 times, other times it blinks 7times. This started about four years after I bought it, which is not adecent lifetime for a CRT TV. It would happen anytime from 2 or 3 timesan hour to 30 to 40 times an hour. After getting absolutely nowherewith Sony, which was completely unresponsive and unhelpful, and which refusedto stand by their product or provide any useful information, I wasgetting ready to buy a new LCD TV, any brand but Sony (never buyanything from them again), when on a whim I decided to try one last stopgap solution.
I put a fan up against the side of the TV, blowing into the vents. Ithas been 3 days now, and not once has the fading and shutting downoccurred. So it looks like the fading out and shutting down wassomehow related to heat, and the ventilation seems to have solved it. I don't know why it should be a problem now, when it was not the first fewyears. It is also a mystery why Sony has not been able to figure thisout, since it is clear from online postings that many people have thisproblem with this model. Give this a try and see if it solves theproblem for you.
Posted on Feb 10, 2009
6 blinks is a horizontal sweep problem (I think). If the problem did not show up at the shop, I'd suspect bad connections that the move "corrected" for the short term. If you can solder, resolder any joints that appear grainy or have rings. Pay particular attention to the area close to the flyback transformer (part with large red wire coming out the top). Report back here with your results.
Posted on Apr 08, 2008
I am being told the flyback transformer is no longer available for the KV30. Does anyone have a nx6200/x fbt?
Posted on May 23, 2008
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Posted on Jan 02, 2017
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Oct 14, 2012 | Sony FD Trinitron WEGA KV-32FS120 32" TV
Apr 16, 2012 | Sony FD Trinitron WEGA KV-30HS420 30" TV
Mar 06, 2011 | Sony FD Trinitron WEGA KV-30HS420 30" TV
shutdown. The high voltage has exceeded 33k and the unit goes
immediately into safety shutdown. Check power supply regulation and
Hope that points the engineer in the right direction.
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