Question about Philips Magnavox 20MT133S 20" TV

1 Answer

Tv showing blue screen with flyback lines sound ok

I have this philips 28 inches wide screen type that started its problem by showing poor picture with imposed flyback lines in blue colour.but afterwards the screen remain blue with flyback lines only no picture, no raster but sound ok pls help i this regard. many thanks to every one concerns

Posted by on

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.


    An expert whose answer got voted for 500 times.

  • Master
  • 3,130 Answers
Re: Tv showing blue screen with flyback lines sound ok

Flyback lines? Is the picture all white with no brightness control with faint horizontal faint lines? If this is what you are saying, the screen voltage could be bad, and if thats the case, the picture tube or the flyback itself could be bad. You could also have a bad connection on the crt socket

Posted on Dec 27, 2006

Add Your Answer

0 characters

Uploading: 0%


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


3 Points

Related Questions:

1 Answer

I have an old 36 inch widescreen Philips CRT TV which has been working fine for 7 years until yesterday when the whole screen just went blue with a series of white horizontal lines. The audio is still OK...

Since there is a blue screen atleast, I don't think that the picture tube is gone. The fault may be either to its chroma IC or video output section. In both sections fault cases, this type of horizontal lines [parellel to each other at about 1 inch or so apart the entire screen] will be seen. Just check the voltages at the three cathode, ie, red, blue and green of the piclture tube. This can be measured at the picrture tube neck card. If you have through knoledge in electronics, have patience and enough tools to do the work, inform me through Fixya. Without these, you can't work on a tv, especially in Philips.
Otherwise, get it checked by any expereinced service technician. OK.

Feb 21, 2011 | Philips Standard (CRT) Televisions

1 Answer

Sony wega 28 inch colours wrong, circle on screen

It sounds that there is some magnet near by TV that is affecting picture tube. Please remove any extra speaker or any thing that has strong magnet inside, unplug TV for 20-30 minutes, replug back in, turn it ON, hope that will solve your TV problem.

Nov 16, 2009 | Sony WEGA KV-28HX15 28" TV

1 Answer

Sony triniton 28" crt tv i have got sound but no picture

Any set can be repaired it is the question of the cost and the availability of the parts.

The fuzzy lines with static noise is probably from an arcing in the high voltage multiplier or in the flyback windinngs. I am very sure that the flyback assembly with the high voltage multiplier, and most likely the horizontal output transistor will have to be changed just to start. It is also possible that there may be some failure in the power supply as well.

The set would have to be serviced by an experienced TV tech. As for the cost, it will be a bit expensive.

Jerry G.

Apr 20, 2008 | Sony FD Trinitron KV-28FQ75 28" TV

1 Answer


Hi there!
Sounds like convergence Amp to me. Refer to a repairer if you are not sure. Good luck,JUS004

Jan 11, 2008 | Mitsubishi VS-55707 TV

1 Answer

Diagonal lines and ghost images

You may have a bad flyback transformer (high voltage trans former). The lines you're seeing are retrace lines caused by the picture tube screen set too high. This is often caused by the screen control opening up. This control is part of the flyback.

Dec 02, 2007 | Proscan PS32500 32" TV

1 Answer

Picture fault



What is picture like if you change screen size to 4-3  is this picture size ok & fault only shows in the wide screen formats.

Oct 10, 2007 | Standard (CRT) Televisions

1 Answer

Philips 28PW6515-05 flat screen TV

You have a bad connection on the CRT board thats mounted on the end of the picture tube it sounds like, or the socket on that board that plugs into the TV set is intermittant or has a bad solder connection on it. Good Luck

Mar 27, 2007 | Philips 28PW6506 28" TV

1 Answer

Blue tint and lines on screen.

Those lines sound like "retrace lines" and several things can cause them. The most common are shorts inside the picture tube and shorted semiconductors in the video driver circuits. They can also be seen if the blue screen voltage is too high or if someone has tampered with the screen voltage control.

Jan 20, 2007 | Philips 28PW9536 28" TV

1 Answer

Philips 28PW6332 28" TV

Simple problem. In all likelihood, The Vertical Output IC has failed. It will be TDA 8177. Replace. Or, it could also be that the Supply to that IC has failed. Unless you are competent in Solid State repairs, do not try this by yourself. get a professional Technician to have a look.IC should not cost more than 15-20$ pluch Tecnician fees.

Aug 21, 2006 | Philips 28PW6506 28" TV

1 Answer

Circlular discolouration on screen

Im sorry My friend I dont have a clue what your saying .. I need a picture or more detail as I dont have a clue where to start get back to us.

May 28, 2006 | Philips 28PW6006 28" TV

Not finding what you are looking for?
Philips Magnavox 20MT133S 20" TV Logo

303 people viewed this question

Ask a Question

Usually answered in minutes!

Top Philips Standard (CRT) Televisions Experts

Sp Gupta

Level 3 Expert

656 Answers

Jim Evans

Level 2 Expert

186 Answers


Level 3 Expert

485 Answers

Are you a Philips Standard (CRT) Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides