Question about Sony 40 KDL40EX720 3D LCD TV

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How to fix problem on sony TV KDL40EX720 with sound but no picture?

Picture comes after 30 min distorted with green patches

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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davebies
  • 43 Answers

SOURCE: Same problem: picture goes out

Sounds like you need to replace the lamp. The owners manual should show you how to replace the lamp. You can order the lamp through Sony on their website. Good Luck

Posted on Jan 30, 2008

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vinnyq
  • 157 Answers

SOURCE: sony bravia kdl-52w3000, turn tv on, no picture or

Most likely this is caused by a defective main board. Changing the main board will fix the issue about 95% of the time.

To be absolutely sure, the voltages need to be checked on the power supply. If they are not the values listed in the service manual, then you should replace the power supply instead (accounts for the other 5% of the time).

Posted on Oct 07, 2009

  • 160 Answers

SOURCE: Picture and sound cuts in and out

Lamp inside of your TV set is nearing end of lifespan. Replace it.

Posted on Mar 10, 2010

welcomejee
  • 10594 Answers

SOURCE: my Sony KDF-E42A10 turns on

It is symptom of weak lamp that reaches at end of its working life, replace lamp in tv to fix the issue.
Lamp replacement procedure is easy and written in user manual.
Thanks.

Posted on Aug 31, 2010

welcomejee
  • 10594 Answers

SOURCE: while watchig mv sony kdf-e55a20 tv, picture and

Seems lamp issue that reached to end of its working life and requires replacement.
If lamp has not been replaced in last 2-3 years, change it.
Thanks.

Posted on Sep 18, 2010

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We have sound but no picture


LCD Easy Fix (sound but no picture) - YouTube

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www.tomsguide.com/forum/56867-4-sony-bravia-black-screen

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Dec 14, 2015 | Sony BRAVIA KDL-55XBR8 55 in. HDTV LCD TV

1 Answer

How to fix problem on sony TV KDL40EX720 with sound but no picture?


Check the voltage that goes to its back light inverter board, from the main power supply regulator board. If there is no voltage, there will be no backlight and the screen will be dark. If there is voltage, and still the screen is dark, you have to contact the authorized service center for Sony; because, to repair it, the display panel have to be disassembled. It is a skilled work, and not a user repairable one.
If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. Surf the site with patience. Pull up older posts. Surf the site with patience.
http://electronicshelponline.blogspot.com/

Apr 14, 2014 | Sony 40 KDL40EX720 3D LCD TV

1 Answer

Problem with Sony KDS-60A2000 60


Hello
The power supply regulator board has the fault. There ie no repair to this board. You have to replace it as card basis.
This is the picture of the said power supply board to your Sony TV.2_5_2012_4_35_40_am.jpg

Feb 05, 2012 | Sony KDS-60A2000 60" HDTV

1 Answer

My tv comes on runs for 30 sec. then loses sound and picture for 30 sec. and the standby light flashes green for 30 sec. then the picture and sound comes on . then about 30.sec. later it does the whole...


Hi,
It is symptom of weak lamp that has been reached to an end of its working hours life but not dead/ broke yet.
If lamp has not been replaced in last 2-3 years then please replace lamp in tv to get solve this problem.
Lamp replacement procedure is easy and written in user manual, please buy Sony original lamp for good picture in tv.
Thanks.

Feb 11, 2011 | Sony KDF-E50A10 LCD TV

1 Answer

I'm having a problem with the color green being distorted on my TV. Is this a color tube issue, bulb issue, lamp issue?


This is a picture tube type TV. No lamp.
You don't describe the distortion.
A colour green picture that is twisted and shifted away from the other colours is a convergence problem. see Projection TV Convergence on this site.
If the green is smeared, out of focus, larger than the other colours like a halo around objects, things like that, it is the green picture tube. Sony has discontinued most of the picture tubes so you may not be able to get this fixed.

Mar 31, 2010 | Sony KP-46WT520 46" Rear Projection...

1 Answer

TURNS ON OK THEN SHUTS DOWN, GREEN LIGHT STAYS ON


Mine does the same thing try a new lamp I am with what I have read this is the best solution. I have had green screen two fans replaced and now this. The picture was great but with all the problems i would never but a sony product ever again for anyone out there you should tell them sony sucks and send them to this web site for clues. Good luck.

Dec 27, 2008 | Sony Grand WEGA KDF-55XS955 55" Rear...

1 Answer

Problem with rca hd52w58 52" tv


This can be a green crt or green driver pcb problem. You can try and unplug the tv for 30 min. and plug it back in and turn it on, but the problem will most likly still be there. A repair shop will need to fix it from there.

Oct 22, 2008 | RCA HD52W58 52" TV

1 Answer

Picture is green and stays green


check the convergence area for bad solder connection
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
Sony Convergence
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
http://www.techlore.com/article/19631/Sony-Convergence-Procedure/

Aug 19, 2007 | Pioneer SD-643HD5 64" Rear Projection...

1 Answer

Green screen with almost horizontal zigzag lines


Is good that you hit it and it reacts,very likely you have loose conections in different places but for the distorted picture you need to check the horizontal driver transformer and flyback after that is corrected you need to check the complete chassis for loose conections.Take your time.Good luck.

Sep 07, 2006 | Sony FD Trinitron WEGA KV-27FS100 27" TV

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