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Issues with new cocktail table
Question from Kelly: Hi. I recently built an arcade cocktail table. I wired up the JAMMA harness for a 60-in-1 board and I cannot get any video. The +5 volts, the +12 volts, and grounds are hooked up correctly. The monitor works properly as hooked it up to a different source. The dip switches on the board are set to VGA. I’ve tried two brand new boards and still the same thing. The only thing I did not do was hook up the negative 5 volts. I don’t know if this has anything to do with it. Any help you have would be appreciated. The board seems to power up OK with green lights so I’m not sure what else I could try.
1 answer
Response from Jonathan: Kelly,
Did you make sure that the power supply was outputting the correct voltage before you hooked up the board? If you watch the video, you will see that we test the voltage off the power supply with a multimeter before we hook up any board in the cabinet. This is important because it can cause the board to work erratically and/or damage the board if the voltage is not correct. In your case, this sounds more like a symptom of low voltage. Even if the LED on the board comes on, it doesn’t necessarily mean that the board is getting enough power to run (just that it’s getting enough to light the LED). If the voltage is right at the mark (i.e. +5 VDC is right at +5 VDC on your multimeter), you might try turning the voltage up to about +5.1 VDC to see if it makes a difference. Hope that helps.
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