Question Trying to fix a 1 chip Super Famicom

Discussion in 'Other' started by Booshman, Oct 28, 2019.

  1. Booshman .

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    Hopefully someone can help me out here. I have a Super Famicom which won't display an image. Just a black screen with some interference on occasion. I can get sound.

    I checked the caps on the top and they all look good.

    On the bottom some of the caps are shorting to ground on both sides. Also there is continuity between the ground pin of the voltage regulator and the output. I'm getting 13v in and 5v out as expected, but it's getting grounded somewhere and I'm really stuck as to how to continue fault finding. The traces on the bottom of the board are barely visible to try and follow them around.

    I removed the voltage regulator and the pins don't have continuity when out of circuit, the pads where the vr was taken from do though.

    Of course, all help is much appreciated.
     

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