Update, got the new touchpad in from spyder controls, doing the exact same thing. Got a few guesses on what the issue could be.
One, hopefully just the power switch. Has felt "off" for a while, before the touchpad went dark it actually malfunctioned first and was stuck "on". Tested the diode behind the switch, it tested ok. When testing the switch itself, I could get the resistance between any of the prongs to change resistance while the button was pressed. Might try to take the switch apart (carefully) and see if the contacts are corroded and if I can clean them up.
The other answer is the ECM went out. Hopefully not that, not sure on lead times for that part.