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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Re: kp-57hw40 flashes red, sometimes green, or blue and...
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.
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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!
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. . . .