

Most machines have an option to reset BIOS to factory by holding the power button for over 30 seconds. I’d hold the power button (when it has lights on) for 45 seconds straight. Upon next boot, the factory BIOS settings should apply.
If it’s still not booting, check the battery connections for any pins being bent, or the connection clips not fully seated.
Finally, if all else fails, find the CMOS battery and take it out, hold power button, then put it back in and try to boot up once more. See the Dell link below for info on the CMOS. https://www.dell.com/support/kbdoc/en-us/000124377/how-to-perform-a-bios-or-cmos-reset-and-clear-the-nvram-on-dell-systems



Dynamic pooling could make this more accessible to lower power macs.
Are there other handlers that can bundle computers into a local Ai instance in a similar manner?