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

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Sony trinitrion tv fades blue and wont come on until hit hard on the back

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Sounds like you have a power supply problem. Could be as simple as a cold solder joint. Check the solder connections oin the power suplly area. Especially any large components like caps or regulators, etc...

Posted on Jan 17, 2009

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I have a sony kdf50we655 TV. Over the last 12 months, the picture has been increasingly "pixelating" with royal blue dots. It started with the lower right corner of the screen fading from black...


This is not a LAMP issue, it is much more serious than that, you need to have it checked by a certified technician, it sounds like the image prossessor

Jul 27, 2011 | Sony Televison & Video

1 Answer

My 27" Hitachi TV is about 14-15 yrs. Last night


could be alot of things but it comes on by hitting it makes me think either a bad relay or solder connection on the pcb board

Jan 29, 2011 | Sony FD Trinitron WEGA KV-36FS120 36" TV

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Sony Trinitrion WEGA starts then stops,then timer light flashes eight times.


  • Eight blinks - Problem with the audio (AUDIO), unit goes to standby and blinks the self-diagnosis code. Check IC406 audio amp, PS401, and 402. On some projection models of Sony TV sets, this code means that T8005 (flyback transformer), or the associative components in the high voltage circuits are defective on the D board.
Have you got external loudspeakers that have dodgy wiring? Just a thought.

Jan 15, 2011 | Sony FD Trinitron WEGA KV-32FS120 32" TV

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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

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My sony trinitrion always displays the video input. Who used to faed away, but is now staying on all the time. Doesn't matter if it's input 1, 2, 3, 4, etc. Turned off and unplugged but still displays all...


Using the TV's remote and having the TV on,
hold down the "reset" button and manually turn off the TV directly from the unit.(not the remote)
Release the "reset" button.
Turn the TV back on-directly from the unit.(not the remote)
A dialog box will appear on your screen.
Choose "Auto" by pushing the + on Channel Selection button on the unit (not the remote).
Use the TV/DVD selection to return to your cable input.

Jul 17, 2010 | Sony FD Trinitron WEGA KV-32HS500 32" TV

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I own a sony colour Trinitrion 330v 50h Televion


sounds like you are not getting video info. picture tube probably o.k. check the inputs on the back of the set. don't know about repair shops in your location. do you have sound?

Sep 21, 2009 | Televison & Video

1 Answer

Sony 36xbr800 shuts off on own


sounds like one of your color tubes or a system board is failing and will have to be tested and replaced by repairman

Feb 11, 2009 | Sony FD Trinitron WEGA KV-36XBR800 36" TV

1 Answer

Blue screen


this problem is due to blue video circuit. 1 Please check supply to blue video ckt. 2 check crt base for loose. 3 check loose contact & parts related to blue cathode. 4 blue signal coming from processor to blue video. 5 processor it self. 6 at last if tv is very old than check crt also.(possibility is rear) hope this will help.

Oct 03, 2007 | Sharp 32C-240 32" TV

1 Answer

FADING TO BLUE SCREEN


Sounds like you have a problem with the blue gun in your picture tube or its drive circuit. You might remove the back cover and gently tap on the neck of the picture tube using a plastic screwdriver handle while watching the screen in a mirrow. If the picture flashes back on or on and off then the picture tube is the problem. If this is a projection tv you have three separate tubes : red, green & blue. you'd need to tap the blut one.Gently!!!! Stargazer

Feb 13, 2007 | Sony KP-53HS20 TV

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