Question about Sony KP-51HW40 51" Rear Projection Television

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Kp-57hw40 flashes red, sometimes green, or blue and powers down

Have adj front pots counter clockwise to insure lines are out, but tv will still, after on a while go bright green, or red, rarely blue, then power off. see oval lines when this occurs. have spare D board for parts. Could the STK392-560 be the problem and if so, which one? Gently tapping on CRT's seems to create same problem

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  • j j Feb 18, 2008

    Purchased the focus block, and adjusted all pots. worked great for two days then problem returned. green flashes and also a red flash. Looks like I'm back to square 1. . . .

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Focus block where the trimpots are that you turned down, appears to be suspect. Or it could be the CRTs themselves, but probability would say that not 2 out of 3 - and the third occasionally - of the guns would fail like this.

The FB prolly is leaking internally. It deals with HV all the time as part of its process. That HV could be breaking down the internal insulation.

I would replace it, re-set it up, and go from there.


Mr Bob

Posted on Feb 04, 2008

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Have Sony Model# KP-57HW40 Big screen rear projection tv..Has blue wavy lines across screen, and sometimes flashes blue, can you give me assistance??


Blue Picture Tube , bad Video IC on Blue CRT board.Or Blue screen drive control to tube needs to be adjusted down some.

Most Likely Bad Tube!

Jul 12, 2010 | Sony KP-57HW40 57" Rear Projection...

1 Answer

Sony KP 57HW40, blue flashes and sometimes shuts off


can you solder? there may just be some dry solder joints and or caps and a voltage regulator that are causing this.
otherwise you are looking at a $400 or so repair!

Jan 11, 2009 | Sony KP-57HW40 57" Rear Projection...

4 Answers

Green flashes then tv turns off


or a new lamp. you could first replace the lamp.
the screen might work fine for a couple of seconds, but then it fades away or deteriorates. This means the lamp is going bad.

Aug 23, 2008 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Sony Color Rear Video Projector - KP 57hw40 / Mfg. February 2002


i have the same problem picture is blue/green with blue and green arched horizontal lines

no picture at all only sound then tv shuts off after 5-10 seconds and then a bright blue flash in the center of the screen

have tried adjusting the voltage screws didnt do anything

Jul 13, 2008 | Sony KP-57HW40 57" Rear Projection...

1 Answer

Kp-57hw40 screen goes bright red or green then powers off


http://esupport.sony.com/perl/news-item.pl?news_id=24
heres a recall of sony hope it helps.

Dec 18, 2007 | Sony KP-57HW40 57" Rear Projection...

2 Answers

Sony KP-57HW40 Error Codes 6 & 8


ITS PROBABLY THE RED PICTURE TUB (CRT). IT LOOKS EASY TO INSTALL, BUT YOU NEED TO MAKE ADJUSTMENTS TO THE SCREEN ONCE IT IS INSTALLED. THE PART IS $3OO. TRY TO FIND SOMEONE TO INSTALL IT FOR $150 OR LESS. HERE IS A WEBSITE TO HELP YOU MAKE ADJUSTMENT IN THE FUTURE ON YOU OWN.

PRIDAH


http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html

Nov 10, 2007 | Sony KP-57WS500 57" Rear Projection...

1 Answer

Green flashes


It is a defective green CRT and most likely the red and blue will need to be replaced as well. This was a known issues with this year of Sony projection TV's.

Apr 07, 2007 | Sony KP-57HW40 57" Rear Projection...

9 Answers

Green flashes then tv turns off


OMG! My TV has been sitting in a closet for the last three years because I couldn't afford to have it fixed.  I have googled now and then trying to find a cure for its green affliction but never found the right advice until tonight. I can't thank J19666566666 enough!!  I just followed the instructions and presto!  Working TV again! And just in time for the Oscars (which is like the Super Bowl for me).  
The editor in me tweaked the instructions a little...
Its is real easy to fix. There are 2 screws holding the front speaker cover on near the bottom corners (there are plastic plugs covering the screws that need to come out first). Unscrew and remove the speaker cover (pull it out from the bottom a little then sort of down and out to get it loose but be careful because there are wires attached). Next remove the 4 screws holding the particle board panel in place. There will be a cluster of 6 adjustment nobs with a drop of white paint on each one (2 rows of 3 - do not touch the top row). The green is controlled by the bottom middle screw, Using a screwdriver turn it counter clockwise (to the left) ever so slightly (1-3mm) and there you have your TV back. Use the bottom right screw to adjust the red and bottom left screw for blue. 
Thanks again so much!

Jan 08, 2007 | Sony KP-51HW40 51" Rear Projection...

2 Answers

57" 2003 sony non-xbr projextion


there's a lot of talk in the internet that the pots in the front of the tv will take these (horizontal?) lines out . i have the kp-57hw40, and there is a web site with pictures on making the adjustment. i believe the bottom 3 pots are blue, green, red going from left to right. mark the pots first so you know where you started, and they say it takes just a hair adjustment counter clockwise to remove the lines. Only go to the point the lines disappear. web site shows how to get front cover off via two screws hidden in bottom and then take off the cardboard cover to get at pots. Not to be smart, but don't be careless, keep hands out since there are high voltage circuits just inside there. . . .

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