Mach 3 stops Every 10 minutes with no errors

Hello all, my mach 3 stops every10 minutes, precisly.

its like someon hit reset button after 10 minutes from i press reset for the first time. this happens also with the machine turned off and only with the usb cabel wired to the pc.

i tried to check power saving options
usb power
changed pc
changed power cables but i can0t figure it you.

when Reset button apperas the light flash between green and red then i can press again reset, restart the spindle and the machine continue the operations where it left.

what can i investigate more?

thanks