Question about Sony KP-57WV700 57" Rear Projection HDTV

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Sony KP 57WV700 Rear Projection blinks 5 times when turning on. No picture when connected to Component or DVI plugs but I can get picture with composite video (yellow cable). I can get audio. I tried to adjust the 3 voltage knobs.

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  • Sony Master
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Hi,

Five blinks mean: White balance failure (Not balanced) Possible causes: Video out (IC7101, 7201, 7301) is faulty (CR, CG, CB board), CRT drive (IC309) is faulty (A board), G2 is improperly adjusted. Symptoms of the problem: No raster is generated, CRT cathode current detection reference pulse output is small.

In your case it looks like you have a faulty crt drive on the A board, the A board must be replaced. For that reason the set works only on composite, where signal is analog.

Before replacing the A board all input ports must be tested, the A board can be tested following indications on service manual.

The A board and service manual can be ordered from:

Encompass Parts Distribution

or

Electronics parts & more from PartStore.com

Regards.

Posted on Jun 19, 2009

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