I should have heeded my number one axiom: "It's me, it's always me".
I installed Windows 8.1 and all drivers then re-flashed the BIOS in Windows instead of using the F7 method and it just worked. Re-installed Openelec and all is fine.
I am glad to hear you have fixed this problem. Enjoy!
Now both OPENelec i3 nucs can be powered on from full off state via remote?
Still on 0022?
Can't get my i5 NUC to be powered on from full off state via remote after battery-removing clear cmos.