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Quoted from KenH:I wonder if you could use a cheapy 12/5v pc power supply like this:
amazon.com link »
We do use a supply similar to that for bench testing our displays. We cut the connector off and replace it with a 4-pin 0.156 KK molex connector. I have not tried to integrate one within a game.
Quoted from barakandl:I don't know how much current the color dmd pulls, but i had trouble getting one of those to power up a sys11 board. Then again that board is full of power hungry ics.
I got a cheapy mean well 12v/5v psu on the bench now. Works well, not sure how reliable it would be long term with extended power on time, i see chinese no name brand caps in it.
12V is less than 1A and depends on backlight brightness.
5V is under 100mA and mainly used to drive the USB port.
Its not easy to test for a failing bridge rectifier or capacitor so I'm not sure about what you were told by the board repair person. The problem can also be caused by a poor solder joint or cracked traces.
You can try reflowing the solder connections for the 5v bridge and cap. It that doesn't resolve it, replace the components.
The ColorDMD mainly draws power from the 12V supply and would not trigger a reset on the 5V logic. However if there's any doubt, unplug the ColorDMD and start flipping all flippers at the same time. It should still trigger the reset.
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