not cool per se,
but i had a touchtunes jukebox that the computer wouldn't automatically power on, regardless of the BIOS on AC restore setting (it's a known issue with these computers.)
usually it involves sending the computer back to touchtunes and wating for a new one...but as of now, they are EOL and NLA.
so i voided the "warranty" and peeled it open. if i jumped the power switch connection it would fire right up. normally i'd pop a capacitor on the pins and call it a day, but for whatever reason the board powers on does a quick test or something then shuts off. so a jumper cap would charge up and wouldn't comeback on. so i programmed an Arduino to wait 10 seconds then "press" the power button for me.
it was only like 8 lines of code, but now it works again.