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

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My Sony 55" HD keeps turning off by it self

The TV turns off by it self an then turns back on after a fews seconds. It is 3 years old

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  • Anonymous Mar 03, 2009

    My tv is doing the same thing. Only two years old!

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Could be the remote sencer that is in the tv or bad swithes that are leaking. I have seen this happen before the sencer is a small electronic eye that picks up the signal from your remote when you push the buttons on it. The switches im talking about are small button switches that are soldered to a board right behind where you would push the power button and chanel buttons on the set itself. I would start with the switches frist if it was me. Some times you can trace the wires on the front where the switches are and unplug that set of wires and stil use the remote to turn on the set to see if it still does the same thing. The remote sencer on some models are pluged in seperate if so then this should help you to trouable shoot this problem.

Posted on Mar 01, 2009

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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.


REGARDS, SD TECH

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

2 Answers

When you turn the tv on it go right back off Mitsubishi WS-55511 55 in. It about (5)yrs old I have try unplugging the tv for about 3 to 5 minute


Do this: When you turn it on and the green power light comes on and goes off:

On the front of the set press and hold BOTH the Menu and Input buttons at the same time for at least 5 seconds and then release both.

This model has a self check: The green power light will then blink a two digit error code: most common is 2 blinks, 2 blinks and a pause and repeat the error code at least 5 times.

Let me know what you find and I will tell you what it means.

I hope you get 2,2 as it is the most easy to resolve.

If this told you something you did not know rate this solution as very helpful as I do this here for free.

REGARDS, SD TECH

Aug 12, 2010 | Mitsubishi WS-55511 55" Rear Projection...

1 Answer

Turning off when trying to turn tv on..


If power light comes on for a few seconds and then goes off: On the front of the set press and HOLD both the menu and input (device) buttons at the same time for at least five seconds and then release both.

The power light should blink a two digit error code: 2 blinks, a pause and 2 blinks is the most common.

Tell me model number and what error code you find and I will tell you what it means and if possible what needs to be done.

This is a self check feature all WS model numbers had.

SD TECH

Apr 27, 2010 | Mitsubishi WS-65513 65" Rear Projection...

3 Answers

Set is 7 years old - it turns off intermintently


Ours used to do that - and then we moved it to another state with us. Since the move it doesn't shut itself off anymore. I suspect that the problem was dirt and dust inside which got knocked loose in the move and the shutdown was due to thermal limits being exceeded. You may want to try vacuuming or blowing out the dust inside if you feel comfortable opening up the unit.

Feb 15, 2010 | RCA D52W135D 52 in. TV/DVD Combo

1 Answer

Rear proj TV picture keeps blinking out


comon sony problem Sony has and Ik circuit tha is suppose to not allow video in there is an uneven emission from the crts what you have on both sets the tube are getting so weak causing the circuit to kick in and out in other word you need crts inboth set and they are not avail new you can have them rebuild but the set will never look good again time to retire them

Dec 01, 2009 | Sony Grand WEGA KDF-50WE655 50" Rear...

2 Answers

The tv turns on but then shuts down. will not stay on, any ideas why?


If its Sony KDF-42WE655 TV then it has self diagnostic feature and if it gets any problem inside, its red light will start blinking in specific numbers to show an error code.
Let me know how many times its red standby light blinking between 3 seconds interval.

Nov 29, 2009 | Sony Grand WEGA KDF-42WE655 42" Rear...

1 Answer

My sony wega keeps cutting off then coming back .


a couple of years old can be a long time:

has the TV been on 24\7

It's the amount of hours that matters..

electrolytic capacitors typically last 3000 to 5000 hours....

Special "long life" caps last close to 7000
but the caps in most consumer electronics, even broadcast equipment 3-5K hours.

Jun 16, 2009 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

RCA will not turn on


replace the flyback. you can get a replacement at the following link with free tech support to expain step by step how to replace it. you need flyback 259296 Heres the link.
http://servicemanuals.vstore.ca/

Aug 11, 2008 | RCA D61W20 61" Rear Projection Television

2 Answers

My Sony comes on then both sound and picture goes black.


After being on a little while, the screen goes black (no audio as well) for 20 to 30 seconds. Green light stays on. Then, picture comes back on and takes a couple of seconds to get up to full brightness. About 5 seconds or so after the video comes back, the audio returns.

Until this morning, has only happened a couple of times a day, now happening more often. About 3 times in last 20 minutes.

KDF-E55A20 is about 3 years old.

May 03, 2008 | Sony Grand WEGA KDF-55XS955 55" Rear...

7 Answers

SONY TV KEEPS TURNING ITSELF OFF!!


Its the BULB people! You need to change it every 3 to 5 years! I have had my sony 55" for 6 years... I had Best Buy come out 3 years ago, changed the bulb... it worked fine. Just started flasshing and shut its self off and back on again. Time for another bulb.

May 23, 2007 | Sony KV-28FX60 28" TV

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