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The colors keep going in and out of each other, but when i tap the side of the tv the picture is fine. How can i fix this problem?

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Hello is like the circuit board could be loose or threres a dry joint some whare. all the best

shaun

Posted on Aug 02, 2009

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Westinghouse SK-26H520S LCD TV has blue screen on the side


Vertical color scan has an open or short..............it could also be a ground problem with in the V-color scan circuits...

If you tap the tv and the color bar is gone then its a ground problem with in those circuits above. Needs a solder re-flow and check the condition of ribbon cables.


CWR

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whats the model number of the set, But its sounds like the convergence ICs need to be resolderd.

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try tapping tv on side with palm and see if it works it might be a bad video chip

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I had the same problem. Can't remember where, but I had to re-solder some joints. If you look very closely to the bottom of the motherboard, you might be able to see a cracked solder joint, otherwise carefully touch each one to fix it. Easy fix and the tv's been running flawless for going on 3 years now. 
Be careful to not touch anything on the high voltage side with your hands. Even with it unplugged.

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KEEP FADING TO BRIGHT BLUE SCREEN


I'm about 90% sure it is the blue picture tube developing an intermittent heater to cathode short. I'm surprised the set isn't shutting down shortly after this happens. A service call will tell you for sure as it could also be a bad solder connection causing a similar symptom. My own procedure to check it out would be to GENTLY tap the neck of the suspected picture tube with a screwdriver handle to see if I could get it to come and go (Or get out my CRT tester and measure it with the power off). Obviously by holding the screwdriver blade you don't want to accidently short anything out as there is about 33,000 volts a few inches away from where I would be tapping. Nuff Said.

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1 Answer

Picture turns to lines


sounds like an intermittant connection on the convergence IC'S or the vertical sweep curcuit. I would advise that you seek to have this fixed as soon as possible as tapping on the side can and will cause other problems in the set.. I would also advise that if your not an experienced tech take the set in to a repair shop. Good Luck

May 19, 2006 | Toshiba 57H83 TV

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