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My Revenge From Mars has lost the R in the RGB

Discussion in 'Pinball Tech Support' started by Aaron Kahn, May 19, 2019.

  1. Aaron Kahn

    Aaron Kahn New Member

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    I should have listened to the person who said "if it ain't broke don't fix it". I decided I wanted to do some maintenance on my RFM because I saw a bulging capacitor on the mobo. I ordered some high quality capacitors and a whole new AT power supply, plus some nice new quiet fans. I also changed both the battery on the Prism card and the mobo. Everything went smoothly, put the PC back in its place and connected everything, crossed my fingers and pressed the power button. It fired right up and everything works, but there is no red in the video at all. Just green and blue. I ran all the video tests and there is no red displayed whatsoever, what would be the red color bars are now all black. I pulled the PC back out and checked all the connections, made triple sure all the capacitors were installed in the right direction, and everything is seated correctly in all the connector sockets. Any ideas what issue to look for first? I think the first step would probably be to test the monitor with another video source, and to test the PC with another monitor? I don't see how the monitor just randomly has a sudden problem it didn't have before. I checked continuity on the VGA adapter card to the ribbon cable, and the VGA cable to the monitor, no problems. I found a solder joint that may have separated on the Prism card when I separated the two halves, but I touched that up and it didn't make any change.

    Any help or advice is appreciated!!
     
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