So... it could be the crystal oscillator on the motherboard.
While it’s all connected, get a flatblade screwdriver or something and short the two power switch pins. If it doeesnt turn right on, mess around with it, wiggle screwdriver back and forth so you make contact then break contact, etc. you might see the CPU fan spin for a second then stop, just means you turned it on then back off. Keep trying, it took me up to a minute sometimes.
If you get it powered on go into bios settings. Look at the clock in standard settings.. is it counting seconds too fast? It so, oscillator is bad and it will no auto-power on, no matter what, and the time will be off perpetually.
I replaced with another force motherboard and everything powered right up and worked as expected.