Question about Sony FD Trinitron WEGA KV-34HS420 34" TV

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Sony Trinitron KV-34HS420 doesn't turn on, blinks 3 times...

My Sony Trinitron KV-34HS420 will blink the standby light 3 times upon pressing the power button, then turns off. From what I've read, this is an issue with the power circuit, but can anyone give me any pointers or advice when I got try repairing this? Should I best call a certified technician instead? I do some bit of electrical work, but never on a TV before. Thanks in advance!

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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jerryg50
  • 1689 Answers

SOURCE: Sony Trinitron Wega kv-36fs120 wont turn on, standby/timer LED flashes 9 times.

The relay is in the power supply area. I am sure that the fault is not the relay.

It is very common that there are various components starting to go off spec from age. Most of the failures are in the scan amplifiers and power supply areas.

It is also possible that the CRT emission is too low from age. What happens is that it is on the minimum edge and this explains why the set may turn on some of the time.

When the main uPC in the set sees any potential fault conditions it will go in to a protection mode to prevent damage and to be safe. Your set is probably borderline to operate.

Considering the age of your set, I would be shopping for a new TV set.

Jerry G.


Posted on Jul 12, 2008

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  • 101 Answers

SOURCE: Sony wega trinitron KV-34HS420

did a quick google got this:

http://www.techlore.com/article/15444/Understanding-Sony-Television-Blinking-Codes/?page=6

blinking is the self diagnosis working.



Posted on Aug 27, 2008

  • 1 Answer

SOURCE: Sony FD Trinitron WEGA Standby Light Blinks, TV Does Not Turn On

Sony FD Trinition Wega KV-32HS510 Try to turn tv on -it starts then shuts off -stand by lights keeps flashing. Memory stick light flashes then goes off.

Posted on Dec 01, 2008

stonephoenix
  • 563 Answers

SOURCE: Sony FD Trinitron WEGA KV-32HS500...red standby light blinks 6 ti

I have over 10 years experience in electronic tech support.

I know this isn't what you want to hear, but the problem you've described can't be fixed with
troubleshooting. Your TV will have to be repaired. There is a part that has developed a defect and needs to be replaced. If you're still in warranty, the TV will be repaired at no charge to you. The warranty would likely be at least one year from the date of purchase from the manufacturer. If you purchased an extended service plan they will repair the TV at no charge as well.

If the TV is no longer in warranty, it will likely cost a minimum of $150 parts and labor. This is assuming that you only need one
circuit board or small part. If the problem is more than one of the circuit boards, the price of repair could go much higher.

I hope I've provided you useful assistance and that this information allows you to make an informed decision as to how to proceed from here. Please be sure to vote on my response. I hope I've earned a good rating from you today.

Please let me know if I can be of further assistance.

Posted on Jul 11, 2009

  • 4234 Answers

SOURCE: sony kv-34hs429

The 6 blinks are a diagnostic code to indicate the problem circuit. I'm on the road at the moment, but will look up the code when I get to the shop. In the mean time, a few questions:

1) Does this occur all the time or just after or before a warmup period?
2) Have you noticed that this is occurring more frequently lately or did this just start?

Thanks,
Dan

Posted on Aug 07, 2009

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1 Answer

3 red blinks


Three blinks - B+ over voltage protection (OVP), unit goes to the standby mode then displays the 3 blink fault. This is also a problem in the power supply circuit, check T603 and R672. To get more details, http://electronicshelponline.blogspot.com/ Blinking codes details to Sony Trinitron TVs are given.

Nov 17, 2013 | Sony FD Trinitron WEGA KV-34HS420 34" TV

2 Answers

My Sony Trinitron shut down last night. I


4 times standby light blink shows that tv got problem in vertical deflection section and probably vertical output IC got defective, need to be replaced.
Replacement of parts in circuit board requires soldering work and expertise so call local tv repair shop guy if you are not familiar with soldering work.
Thanks.

Jul 25, 2010 | Sony FD Trinitron WEGA KV-34HS420 34" TV

2 Answers

Standby lighy blinks tv won't turn on


error code 4 is vertical deflecton failure . replace the vertical deflection ic. and the electrolytic capacitors in the vertical circuit. Or if you are lucky just resolder the vetical IC and resolder th horizontal section too.

Sep 28, 2009 | Sony FD Trinitron WEGA KV-34HS420 34" TV

3 Answers

Standby light stays on and the tv will not go on


Please check batteries in remote that seems not working. Sony TV would either turns On or standby light will blinks if TV gets any internal problem.
You question shows standby light stays On that means TV does not receive power on command from remote.
If standby light is blinking in sequence, let me know how many times it is blinking and also intimate exact model number of TV to find out possible solution.
Thanks.

Sep 21, 2009 | Sony FD Trinitron WEGA KV-34HS420 34" TV

1 Answer

Blinking red light 3 times on sony 34hs420


Ur high voltage transformer it dead.The big block of plastic with the red wire with a cap hook to the CRT(ur tv tube).It call the FBT,
the Flyback Transformer that thing it dead.

Sep 03, 2009 | Sony FD Trinitron WEGA KV-34HS420 34" TV

2 Answers

Sony KV-34HS420 shuts of and stand-by light blinks


  1. Turn off the television. IMPORTANT: For a projection television that uses an internal lamp, wait 5 minutes after turning off the television to allow the lamp to cool before continuing with the following steps.
  2. Unplug the television power cord from the electrical outlet.
  3. Let the television remain without power for 60 seconds.
  4. Plug the power cord back into the electrical outlet. NOTE: If the television is plugged into a power strip or surge protector, remove it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.
  5. Turn on the television.
If the issue is still unresolved after following all of the troubleshooting steps, service may be required. Please note the number of times the STANDBY light flashes and relay that information to the service center.

Source

Sep 01, 2009 | Sony FD Trinitron WEGA KV-34HS420 34" TV

1 Answer

Sony KV-34HS420 Random Shut downs


i would say this is a internal problem how long have you had it?

May 28, 2009 | Sony FD Trinitron WEGA KV-34HS420 34" TV

2 Answers

Sony FD Trinitron WEGA Standby Light Blinks, TV Does Not Turn On


Sony FD Trinition Wega KV-32HS510 Try to turn tv on -it starts then shuts off -stand by lights keeps flashing. Memory stick light flashes then goes off.

Nov 29, 2008 | Sony FD Trinitron WEGA KV-34HS420 34" TV

1 Answer

Sony wega trinitron KV-34HS420


did a quick google got this:

http://www.techlore.com/article/15444/Understanding-Sony-Television-Blinking-Codes/?page=6

blinking is the self diagnosis working.



Aug 27, 2008 | Sony FD Trinitron WEGA KV-34HS420 34" TV

1 Answer

Random Turn-Off on KV-34HS420


Hello there,
7 times blinks shows that Horizontal Deflection Circuit doesn't work properly.
I think, its not big fault and can be resolve in low cost at nearest Sony repair shop.

Feb 18, 2008 | Sony FD Trinitron WEGA KV-34HS420 34" TV

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