This can be caused by the shake detector if you bump the machine a metal cylinder will touch a ring wired up to the speaker and computer when the machine is shaken it will say a message Don't Shake The Machine and sometimes​
It will cause this or something has went wrong in the computer and gives this error to fix unplug your machine for 30sec then plug the machine back in and try again if problems continue call the machines help line or vender and ask for assistance