I thought that the usb cable does not give power and thats why there was additional power hooked up. I forget where I had read that and assumed thats why you hooked up this jumper wire on the I/O usb area
http://img67.imageshack.us/img67/7353/e6ey6.jpg. First I had made a cable to replace the usb cable since Im mounting my I/O on the inside in your fashion. Then I hooked up the 5v power and ground like so in this pic
http://img177.imageshack.us/img177/6944/h3qu8.jpg with one difference. From the looks of the pic the 5v is hooked up to pins 2/3 and ground is hooked up to 12/13 on CN3. Shouldnt the 5v be on pins 1/2 and ground be on pins 13/14 like the I/O board on this page
http://solvalou.mine.nu/beginner/naomi.html#sega_io I used pins 1/2 and 13/14. For my intitial test I mounted on the inside of the case I power up and everything was fine. I let it run for about an hour before turned it off.
My next step I am hard wiring the controls directly to the I/O pcb. I wired in player one just to test. I wired the directions, six inputs,start,coin,ground, and 5v to a modded pad. Im testing the street fighter anny pad as my controller. I have everything wired properly (I think and I hope I do ) so I power up with out the pad plugged in and I get the I/O board not found
If the USB needs power how much does it need.