Question about Toshiba 42H81 42" Rear Projection Television

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Toshiba 42h81 2 green vertical lines, splitting the screen into 3 equal sections. Lines are about 3cm wide and run from top to bottom of screen. Also, white horizontal lines move randomly between these green lines, separately in the 3 sections. As it warms up the white lines grow in intensity and cover the entire screen.

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Re: Toshiba 42h81

I have a Toshiba 42H81 TV - does anyone know where the hyperboard module is located and/or a picture of the board? Many thanks.


Posted on Feb 02, 2008

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Re: Toshiba 42h81

Hello, one of possible solutions is to replace capacitors (10uF/50V) on HYPER (PD0246) module. Please ask the tech to check/replace them. If you need more info please advice.

Posted on Apr 27, 2007

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Lines on top of screen

Hi and welcome to FixYa,

Initially, sounds like a capacitor at the vertical section about to fail, leaking or blistered. Additionally, have seen some of these models suffers from vertical fault due to a defective capacitor in the power supply section or cold solder.

Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.

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The only thing I didn't have was the screen overlay jig the manual talks about. I decided to create one myself and use the screen as a beginning template. I went to our local hardware store and picked up some home window weather covering. The roll cost about $15, is a clear strong plastic and the template was very easy to create. I used a straight edge after I put dots on the plastic and measured the lines for being square and equal after I took it off my tv. Good thing is that if you don't like what you make the first time, you have a 25' roll to use to try again (ha).

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I have not fixed it yet. But I have identified the chip that is causing the problem. If you have a service manual scan it and post it please, so I can show you the chip.

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1 Answer

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Sounds like you may have some bad filter capacitors in the convergence board. Better take a close look at them before they damage the chips. Good Luck
NC Electronic
Mills, Wyoming

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