[Fab] The computer connected to CNC mill won't boot

[Alan Rockefeller]

I was helping someone make speakers with the CNC mill yesterday.  I
didn't get his name - he is an electrical engineer.   The CNC computer
froze while he was using emc2 - The mouse still moved, but the emc2
program was frozen, as was the window manager.  I was unable to start
a terminal, switch to console 1 or kill the window manager with
ctl-alt-backspace.   Upon rebooting the display didn't turn on and the
motherboard gave a series of beep codes.