No brightness for Colorstream either connections

Hi ! Recently bought this TV used from a friend. Analog interfaces work good. When I try to use any one of the 2 Colorstream interfaces, the video is there, the colors seems to be there, but in 'darkness'. Like there is no backlighting to illuminate the colors. It is not a problem with a bad cable box or a bad DVD player, as the previous owner had the same problem. I am pretty knowledgeable with electronics and know how to solder electronics. Can anybody help at least narrow down what may be faulty ?

1 Answer

Anonymous

Sounds like a bad coupling capacitor in the luminance "y" signal processor circuit. Use a schematic of the tv and a osciloscope to find this problem.

Posted on Feb 02, 2007

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