Question about Toshiba 43H70 43" Rear Projection Television

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Powers up no pic

It power`s up the crt`s are lit but no hight voltage, but when i tap the chasses the high voltage comes on and pic is jumpey like a vert proublem
need help

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Re: powers up no pic

You have a bad solder connection in the Vertical deflection circuit. Try re-soldering the vertical output IC and the Vertical yoke pins. You may have to look over the Vertical circuits with a magnifying glass to actually find the bad solder . A hint if the solder looks dull re-solder it.

Posted on Jan 23, 2008

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You have got to have a cold or cracked solder joint. Get a strong light and go over the chassis with a magnifying glass. Solder everything that doesnt look shiny but be looking for hairline cracks in the solder especially near the vertical output IC and associated components.

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well you can tap the convergence board and the crt boards see if you can find a loose connection, however be careful there is high voltage

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