Question about Sony KV-20M20 20" TV

1 Answer

Sound but no picture

Hey u guys .I have a sony television Model KV20M20 that has an problem.I am geting sound but no picture , a blueish back ground and line.Any help or opinion would be greatly appreciated soon . thank you.

Posted by on

  • 2 more comments 
  • deolall Mar 07, 2008

    hey thank you for your help .I will try this repair and let you know soon. O i am a tech as well but i never work on a sony television.

  • deolall Mar 09, 2008

       The problem i am getting no raster but there is sound.a plain screen with lines about 1'' from top to bottom. only when i turn up the flyback screen volt.

  • deolall Mar 11, 2008

    hi there again , I still not getting true with this problem.I am having sound but no raster only when i turn up the screen
     volt on the flyback transformer there is a plain blue screen with line.

  • deolall Mar 14, 2008

    I have a Panasonic 5 cd changer CD stereo system SA-AK240.
    I plug in the ac cord in the 110 volt outlet and the display showing
    me F61 . can you help to solve this problem .thank you.


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers


I suspect a Vertical failure in your Sony TV. This problem is pretty common and is relatively easy to repair. Often, this involves replacing the Vertical IC which is not that expensive. Basic knowledge of electronic circuitry and components, use of a soldering iron and an electronics part shop near you is all that is required. Of course standard safety precautions apply when working with HV such as in your TV.

Should you not be comfortable performing a do-it-yourself, perhaps you may need to seek the services of a qualified professional.

Hope this be of some help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Mar 06, 2008

  • 2 more comments 
  • Louie  Role
    Louie Role Mar 06, 2008

    Hi again,

    If I may add, there are instances that the coupling capacitor also goes bad. This is also normal after some time due to heat buildup. Being not that expensive (a couple of dollars), it may also be worth your while to similarly replace while the set is open. This capacitor would be relatively bigger than the others in the vertical circuit and is commonly located physically near the vertical IC.


  • Louie  Role
    Louie Role Mar 10, 2008

    Copy your last post/update.

    That being the case, then it is not a vertical problem but a probable short/leak in the collector to emitter of the blue drive transistor. They normally can be fount in the small squarish PCB connected at the rear end of the CRT. There would be 3 of them (red, blue & green) You would need to remove the blue one and check for forward and reverse bias. At times, it could also only be a case of cold solder on the b-c-e- terminals.

  • Louie  Role
    Louie Role Mar 12, 2008

    Have you checked the 3 transistors at the small PCB? It could also be a resistor that opened. Usually it is either the one supplying the color drive transistors B+ or the G2 supply. All of then would be there likewise in the small PCB.

  • thefaster Mar 05, 2011



1 Suggested Answer

  • 2 Answers

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

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Picture cutting after 5-10 min-raster OK sound OK

The vertical ICs on this particular model have by now bad grounds. You will have to resolder this, and check any and all grounds on ICs mounted on heat sinks! Bad grounds are common and plentiful. Good Luck and thanks for asking!

Jul 04, 2010 | Sony Televison & Video

1 Answer

Picture turns on and off and the color is a blueish red

yes. you are not getting green. sony has a circuit that if the picture is not perfect, it will shut off. two, take off back and with the tv on, tap pretty hard but not hard enough to break it, on the neck of the picture tube with the plastic end of a phillips screwdriver. this will shake the old sediments in the crt. the tv will probably shut off if you do it right. tap harder and harder many times. fixed. two, rejuvinate the picture tube. fixed. easy

Nov 13, 2009 | Sony KV-27S66 27" TV

1 Answer

My Siny Trinitron G21M1 is producing horizontal lines across the screen

I hope your TV model is Sony KV-G21M1 and you see color bars as horizontal lines across the screen.
Let me now are you tech guy or know how to repair TV to guide you further.

Oct 26, 2008 | Sony Televison & Video

1 Answer

Sony KV-32S66 Picture Rolling Up/Black Horizontal Lines

the problem there is a loose connection on the board,you said that you smacked the right side of the tv and it goes normal.there are parts that should be resolder on the board in order to back into normal operation.

Oct 22, 2008 | Sony KV-32S66 32" TV

1 Answer

Sony tv there is sound but no picture only horizontal line

hi there, one horizontal line means a vertical section prob., check some resistor with low value and a defective diode, possible ic part is defective. do some test and check up. ty

Feb 25, 2008 | Sharp 27C-240 27" TV

1 Answer

White lines in tv whats the problem??????????????

Check the cable that you are using. If it's a "single" shielded cable, it maybe letting in "air" frequencies, like you have an antenea hooked to your TV. Especially if you live in a city that has several Tv stations near you. The cable could be to old and has breaks in it, or not grounded properly.

Dec 22, 2007 | Apex Digital AT2702 27" TV

1 Answer

Sound but no picture

Basic repair for skilled TV repairman = solder connections on
vertical output IC.........Can be done in home.....T.

Nov 28, 2007 | Sony KV-35S42 35" TV

2 Answers

Sound but no picture

I believe the cable guy is correct and I will suggest you call for professional help now,if you try to use it like this the problem might become expensive.

Sep 23, 2006 | Sony KV-35S66 35" TV

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

106 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Televison & Video Experts


Level 3 Expert

100340 Answers

The Knight
The Knight

Level 3 Expert

71126 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Are you a Sony Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides