I have one of Ian Stedman's ATX adapters that I'm trying to use with a 3000T. Prior to connecting it to the motherboard, I want to triple check everything and make sure I'm getting the correct voltages at the plug going into the motherboard. However, I can't seem to get the PSU to turn on. I've installed a jumper on JP4 and set the switch to latch, but when I turn on the PSU via the switch on the mains, I get nothing (no voltage and no fans turning on). I've emailed Ian but he hasn't responded (its only been a few hours).. Has anyone tried to use one of these before and know if you can use it without it plugged into the motherboard?
Edit: The first power supply outputs ~3V on pin 14 and the second output ~5V. When I jumper pin 14 to ground, both PSUs will power up. I looked at the device in my microscope and it appears the lead to the jumper passes through an IC. Github says this is a PIC microcontroller, so I suspect there is an an issue with it as it should operate from 2V to 5.5V (per a datasheet I found)