Question about Sony FD Trinitron WEGA KV-30HS420 30" TV

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Sony KV-30HS420 turns off all by itself

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.

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  • Anonymous May 23, 2008

    Our KV30 also did the same thing. Three years old $982 waisted. Seems the flyback transformer is out and Sony nor anybody carries parts for these sets. I guess this is as close to a legal scam in selling their product.

    If there is any contact info on this, and not the 8oo number that takes you to BFE, please post.

    I could of done something different for $300 a


  • psgrove Jun 12, 2008

    For the past few months it took longer for the picture to disply on my TV. Then suddenly while we were watching our TV the other night it turned off on its own and since then have not beeen able to turn it back on. There is a small red light on the bottom right hand corner (facing the TV) that will blink three times when pushing the power bottom and will go out and the TV won't start. I have unplugged the TV and tried starting it to no avail. Sounds like a similiar problem.

    Is this worth brining someone out to diagnosing the problem? Is the potential fix worth teh cost of fixing? As the otehr person, I purchased the TV 3 years ago for ~$1,000 and I will be pretty irritaed if I need to throw it away after such a short time.

    Any recommendations or solutions are appreciated.

  • Anonymous Jun 28, 2008

    We are having the exact same problem as lewisbk. There is no rhyme or reason to it, no pattern. We'll have hours where the TV works fine, then we get the green goo and black, the TV clicks off, and the blinking red standby timer light comes on. Sometimes this will continue every few minutes, up to hours. Clearly, this is a defective product. We purchased this model from Circuit City in November of 2004 for $860 and bought a Cityadvantage Protection Plan for $250. We tried plugging, unplugging, resetting to manufacturer standards, a "hard" reset" ,but no luck. We are going there today to see what they will do for us.

  • pmfzero1 Jul 19, 2008

    Same problem. it is becoming more frequent.

  • Anonymous Jul 30, 2008

    I have the same problem. Recently the TV started acting up, picture fades to black, sound stays on a few more seconds, then it turns off. Will also vary quite a bit, sometimes go hours without it happening, will often occur numerous times in an hour.

  • Anonymous Aug 03, 2008

    my timer buttons blinks 7 times what does this mean?

  • mel_ga Jan 03, 2009

    I have the same problem now. The picture will go dim, then the sound will cut off and the TV gets switched off. After that, the standby/timer light keeps blinking 7 times after few seconds. Did anyone find a solution to this?

  • Anonymous Jan 24, 2009

    I have exactly the same problem--fades to green then off--with blinking red light. It started almost exactly 3 years after I bought it. This is clearly some kind of systemic bug/flaw in this model. Anyone know if Sony has any plans to stand behind their product? I never heard of a 'quality brand' CRT TV going down after 3 years.



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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

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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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Apr 16, 2012 | Sony FD Trinitron WEGA KV-30HS420 30" TV

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Does the sony KV-30HS420 TV used a lamp..if yes where to lacate it

the KV-30HS420 model is a CRT based set and thus has no "lamp". What is hte proble with the set?


Mar 06, 2011 | Sony FD Trinitron WEGA KV-30HS420 30" TV

1 Answer

Hi there, we have a sony KV-30HS420 30 inch fd Trinitron that is blinking 7 times and then shuts itself off. We can turn it on again but this problem is understandably quite anoying. What do you think...

There is a power supply fault causing the EHT to rise above 33KV.

High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.
Hope that points the engineer in the right direction.

Mar 02, 2011 | Sony FD Trinitron WEGA KV-30HS420 30" TV

1 Answer

I have a 6 year old(nov 04) 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...

If the screen goes rather bright green it is one of two things:

1. It is possible it is a shorted green gun in the picture tube, there are three of them, red, green and blue guns in neck of the tube.

2. The other possible reason is there is a problem on the small circuit board at the end of the picture tube, this model should use three IC chips, one for each red, green and blue.

Being intermittent makes it hard to tell but ask the shop if they tried the self check this set should have. With the set turned off use the original Sony remote and hit Display, 5, vol down, and power.

If the set has a self check (it should) a box will appear on the screen with up to five items with a zero to the right of each, items will be like AKB, OVP, etc, and if any have something other than a zero to the right it pinpoints what happened.

Sets with this feature record each event where something goes wrong, ANYTHING other than a 0 indicates what failure was detected.

If I was to make a guess there will be a number next to AKB, which is Anti-Kine Bias, this means the picture tube or something on the board at the end of it drew too much current and the set's shut down circuit turned the set off.

I actually fixed one of these where both the blue and red IC chips on that board were bad, needless to say, I replaced all three of them.

Any good shop would know about the self check and even if the set did not shut down in the shop the self check would point to the area where the problem is.

Let me know if you need more help or find a error code.


Dec 01, 2010 | Sony FD Trinitron WEGA KV-30HS420 30" TV

2 Answers

Sony WEGA KV30HS420 shuts itself off

Sony KV-30HS420 TV shuts off, indicator light blinks 7 times

Sep 23, 2009 | Sony FD Trinitron WEGA KV-30HS420 30" TV

1 Answer

TV goes to green, sound stays on a few seconds then TV shuts off.

Sounds like you have a bad picture tube. More than likely the CRT could be shorted, which would cause the set to shut down.
My first advise would be to power up the set with an isolation transformer with the voltage about 60% approx. 72 Volts AC, and monitor what happens when you increase the voltage slowly.
If the set remains on at 60 -70 %, then when increased to 90 - 100% it shuts down, you have something drawing too much current ( which could be the CRT )

Sep 14, 2009 | Sony FD Trinitron WEGA KV-30HS420 30" TV

1 Answer


dont use high volt arcing can do lots of damage. unless you can be sure comtng from speaker.

Nov 20, 2008 | Sony FD Trinitron WEGA KV-30HS420 30" TV

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