Question about Sony KP-43HT20 43" Rear Projection HDTV-Ready Television

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TV banged litte in a move

Hi my sony tv was banged litte in the move. Now when we plug the cable in the blue screen comes up, but nothing the regular picture. But if we switch to different mode the DVD player works fine. Can you tell us what could be the problem?

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Re: TV banged litte in a move

Take the back off the set and check for any cracks on the PCB near the tuner. The tuner is where the cable hooks up. Make sure the threaded connector is tight. The set defaults to a blue screen when there is no signal.

Posted on Nov 06, 2007

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When i plug in hd cable screen is distorted

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

Convergence problems are very common on all Projection TV sets including Sony, Samsung, JVC, Philip Magnavox, Panasonic, Akai, Pioneer, Hitachi, Zenith, and others. You can get a convergenece repair kit from the link below.

Common Symptoms include....
  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
  • TV shuts off after powering on - TV may also make a chirping noise.
Here are some photos of convergence problems.


Here is a quick test....

Using your original remote go-to the settings menu then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right.

If you can't move them in all directions or cant move them far enough your convergence chips are bad and should be replaced. This is a common problem.

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a solution


You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you know what you are doing. If you have never done this before we would advise calling a shop or if you want to do it yourself get a complete kit with instructions and support from

Dec 07, 2009 | Philips 55PW9363 55" Rear Projection...

2 Answers

Hi, I turned on my 4 year old Sony 42" plasma today and the screen was black with speckles of colour flashing for a few seconds before fading out and the whole screen goes black. The sound was fine...

in sony 42 inch what is the exact model number of your TV?

also can you tell be how many times does the stand by light blink. that would help us to decode the problem in your TV

thank you

Aug 16, 2008 | Projection Televisions

1 Answer

Tv comes on but nothing on screen only sound stand by light blinks

tv comes on but no picture only sound and i open tv & looked in out of 3 blub only 2 comes on green & red but
blue not coming on what shuld i do ?

Nov 15, 2009 | Sony Grand WEGA KDP-57WS550 57" Rear...

1 Answer

Need a new lamp but screen is becoming filled with blue dots. Tv is 3 yrs old; ave - use. Told it will be useless in 1 yr. Sony projected many yrs of use for this expensive tv. Are they still making this...

No they are not, in fact that type of tv is being phased out. Basically this technology was more bang for your buck ( bigger screens for cheaper), unfortunately they work off of either halogen or led light bulbs which halogens dont last very long. Maybe 5000-7000 hours of use. New bulbs cost around $250, but need special care replacing it in the tv, alignment is crucial to tv clarity.

Aug 07, 2009 | Sony Grand WEGA KDF-60XBR950 60" Rear...

1 Answer

There is no picture anymore, all shows a blue screen.

do you have the orginal remote that has device button on it such as tv,dvd,av1,av2 or a input button on it if so play around with it such as when the blue screen comes on press the tv button or even better if you have cable box with the red,white and yellow plug in the back just plug the red,white,yellow cable from your cable box to the red,white and yellow into
the input of the tv

Jul 31, 2009 | Projection Televisions

5 Answers

No picture but has sound

switch on no picture but short period of sound then nothing

Jan 20, 2008 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Sony with blue screen

make sure you are on tv slection and not video1 ,aux . pull up menu go to setup look for cable/air make sure you are in tv mode not video aux.if this does not fix it then you may have bad tuner.

Jan 13, 2008 | Sony KP-43HT20 43" Rear Projection...

1 Answer

Blue tint screen in video mode

· Which models are affected with the "flicker" problem?
A1: There are 12 models in total: KDP57XBR2, KDP65XBR2, KP46WT500, KP51HW40, KP51WS500, KP57HW40, KP57WS500, KP57WV600, KP57WV700, KP65WS500, KP65WV600 and KP65WV700.

Jan 05, 2008 | Sony KP-57HW40 57" Rear Projection...

1 Answer

Red Green Blue Across The Screen

· ·

Dec 06, 2007 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

S-Video on the blue screen

menu has input selection to turn on/off or name video inputs.....T.

Oct 24, 2007 | Mitsubishi WS-48311 48" Rear Projection...

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