Question about Sony KP-57HW40 57" Rear Projection Television

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Big screen sony tv goes green after 15 minutes. I am pretty handy taking things apart and know how to solder so if I need to get dirt I can. Any good positive solutions would be very thankful. Thank You

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  • Anonymous May 22, 2010

    Sd Tech is a very smart man and I am very thankful I got the tv for free and fixed it for free thanx the Sd. Thanx a million and god bless you man.

  • SD Tech
    SD Tech Oct 24, 2012

    As I stated before the set is prone to bad picture tubes----the way to correct for this is not hard---go to a unused video input---you better have just the Input 1 etc to be seen on the screen--if screen is for example slightly green with diagonal trace lines: You need to remove entire front grill below the front screen---usually secured by 2 or 3 screws on each side on the rear---a few have 2 hidden screws at bottom on front behind round pop out pieces. Pull down and out to remove the grill and tilt it to the left on its side---several wires there that are secured with twist ties---end up with grill left side down. Remove the inspection plate behind it. You will see a small square black block with 6 controls embedded in it---look close---three left to right are marked focus---do not touch those. The remaining row is marked screen--now the tricky part--locate the r,g,or blue screen control for the color that is excessive---I suggest using a plastic tool here so you do not stick your hands inside the opening as with set on dangerous voltages are there--with set on and on that video input lower the correct screen control until the unused input is just black with only the input label (video 1 etc) can be seen----we are talking about a very slight adjustment.



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SD Tech

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  • 14,553 Answers

This model is prone to this problem--bad picture tubes.

I have a way for you to attempt to adjust around it.

Are you interested?


Posted on May 21, 2010

Testimonial: "Yes I'm interested please let me know. It's a Sony KP-57HW40 57 in. Rear Projection Television"

  • 1 more comment 
  • SD Tech
    SD Tech May 21, 2010

    here is what you need to do:

    You will have to remove the entire large plastic grill/plate on the front of the set beneath the screen.

    It will be secured in one of two ways= some have two slightly hidden screws on the front near the bottom (one on either side) with a little snap out plate that covers them=if this then you pop out the covers and remove the screws; the entire front will pull out from the bottom and has hooks that engage at the top, pull out from bottom and let the hooks come clear.

    The other version has up to six screws on the back (some on each side) and removing them will allow removal of the entire grill.

    Note that their is a control panel attached that does not need to be removed; some of the wires are extra long and dressed= you can loosen them enough to turn the grill so the left side is facing down and to the left.

    Behind the grill in the middle is an fiberboard inspection plate. Remove it and look inside.

    Allmost dead center you will see a two and a half inch square black block with two rows of controls.

    You need to look very carefully as one row left to right will be Focus(don't touch those).

    The second row will be SCREEN and Green will be the middle one(you should be able to see r,g,b next to each control but they can be hard to read as the entire block is black).

    The idea here is to try to turn the green screen down. Best way to do this is with the set on a blank video input take a look at the screen= all you should see is the input number and if you see some green or a faint curved green line turn the green screen slowly to the left until it JUST vanishs.

    Since you have to do this with the set on be careful not to touch anything else except the plastic control!

    The set will shut down if any of the three picture tubes does this as it detects too much current is being drawn.

    Let me know if you have Questions before you attempt it.


  • SD Tech
    SD Tech May 22, 2010

    My reward is that it helped you.

    If you or someone you know has a problem just have them address it to my name and I will help.

    regards, SD TECH, Steve

  • matt Oct 22, 2012

    Hello, ive tried this but the green haze is still there? could it be something else



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