Question about Samsung SPN4235 42 in. Plasma HDTV

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Blue flickering on plasma screen

My plasma tv will occasionall get blue flickering at the top and in the one of the corners. Always in the same locations.

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  • Anonymous Jan 27, 2009

    same blue on the screen

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  • 98 Answers

Need to adjust some voltage on the Power Board & Y- Main Board.

Posted on Feb 06, 2009

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Flickers after 5min of use. Perfect sound, turns on fine and excellent picture quality when in blue screen menu mode. Why?


This intermittent problem is very difficult to rectify. Just contact the authorised service center for Hitachi at your town. The work is really a skilled one, that a user cannot do it with ease.

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Very likely the power supply is failing.

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Sometimes the voltage can be set to high by the factory. Throughout time, blue dots will appear. You will have to remove the back cover off the tv, find the "voltage Screws (they are labeled) and turn down (left) JUST A Notch. Have seen this done many times.

Pray that the panel isn't blown out or bad projector tubes. They are expensive.

Blue dots and screen flicker are VERY common on the newer LCD and Plasmas

Also, if you have a pixel setting on your TV (not sure if that one has it) Try setting it to
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Pls report it to Samsung for remedy in warranty. Try to contact here.

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I had the same problem, I had to send it back to Philips to get a $900 part replaced. Thankfully I had the warranty with it.

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1 Answer

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Are you using component video cables? If so, check that these aren't loose on either end. Next I'd consider that whatever video cable/input might be bad, and switch cable or cable type... i.e. switch from component to HDMI or vice-versa. Then change up the source (cable box versus DVD player). If you're still seeing blue at this point, the TV internals are the bad.

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1 Answer

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The driver boards on that side of the set need to be replaced, about $400 for parts.

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same problem anyone know what his is please send me an email. real unhappy!!! this tv cost me $900!!!!! rami7344@bellsouth.net

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1 Answer

Blue shading problem


2 months old? I'd call the dealer..it's under warentee. You have a problem that will not get better.

Jul 14, 2007 | Samsung PS42P4AX 42 in. HD-Ready Plasma...

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