Arcade Collecting > Merit/JVL Touchscreen

Maxx cabinet keys

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orizzle:
Thanks, I did try bridging those 2 pins but no avail (see my last post)

orizzle:
well, now it's working  - sorta. I've removed the ioboard from the motherboard but left the other wires going to it connected. Through a combination of unplugging the PSU, unplugging the 2 x 6 pin connectors, and flipping the switch, it does boot to the menu. I can't play games or access opsetup because the ioboard is disconnected, but I'm going to assume that works. I cannot get the thing to fire up with the ioboard connected. Thinking the ioboard has gone bad? Or maybe it's the PSU... I am going to try ordering an ATX to AT connector adapter and see what happens with a different psu.

obcd:
You could try to locate a very old pc with an AT supply as well. If there is a TELCO motherboard in your cabinet, it's not having a jumper to power on the system. Those older systems simply turned on when the supply was powered, and turned off when the mains voltage is removed from the supply.
The IO boards and the riser card (if you have one) often suffer from bad contacts. You can clean them with a pencil eraser and see if that makes a difference. You can measure the voltages coming out of the supply when it's powered. The red wires are 5V and the yellow ones 12V. There is no 3V3 output on such an AT supply. (There is also a -12V if I remember well) Maybe your io board has a short that makes the supply go into overcurrent protection.

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