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Zenith big screen

Sound is working but the picture is out

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Sound is ok means power supply is ok. as there is no picture there is a problem in video or luminance section. 1 check chroma ic supply 2 check signal line to video section 3 loose contact in video section 4 crt base loose 5 crt supply 6 no supply to g2 7loose contact in brighness line

Posted on Sep 17, 2007

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I have a Zenith 54"


You have Bad Convergence ICs they are Big Black ICs and will have the part number on them ,example STK392-570 Mats Electronics has ICs 1-800-628-1118

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1 Answer

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Unplug the cable box for an hour,replug it back in.Should get the cable box to reboot to updated the softwares.Might work than,tv seem to have picture,somethings on the screen,words mean ur tv still works.

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It could be that the picture tubes have gone down on emission, there is a prcedure that can be tried to bring up the overall brightness but it is just possible that you will loose some picture quality. If it's a 1994 projo tv i am thinking of the three crt system, a gray scale alignment would probably correct the dark condition in your picture, again depending on how far gone is the emission in your picture tubes, if your projo tv is the dlp system, the bad news is that you could be needing some light engine repair. The color adjustment is possible with the availability of a service manual or in the case of the dlp system, light engine repairs or replacement are available from some on line stores.

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1 Answer

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Consider new purchase, your crts are getting old and can't reproduce same quality. High voltage is going and loosing focus. good luck

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1 Answer

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the part maybe no longer available. p/n
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1 Answer

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