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Audio on blank screen !!!! wat to do !!! vistron tv

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Hello,
IF the backlights are on but you just get dim glowing on the screen when look at the screen in darkened room then the T-CON board is bad or it is not getting the 12vdc from the main logic board. Need to use logical troubleshooting before buying the wrong parts, but if otherwise then,
Problem is in either power supply or the Y-Sustain board.

The Y-Sustain is a relatively large board out of which go connections to the side of the display; it's therefore closer to either the left or the right side of the display, has at least one rather large heat sink on it and fat power cables connecting it to the main power supply.

Often there are fuses on that board - one or more. Check those.

if they are blown you can try to replace them, but expect them to blow again - usually the whole board needs to be replaced.

often that *needs* to be done in a service center as there are some adjustments to be made after replacement; don't know about this particular TV model,


Posted on Aug 03, 2010

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