Router has died. Need Advise Please.

[EddyCurrent]

When you look about some people say connect the screen at both ends some one end this is why I mentioned earlier that if connected at both ends and there is a problem it would be easy to remove one end to see if it improved. VFD manuals show the motor screen connected at both ends but in addition an earth cable is also required, ideally this will ensure that both ends of the cable screen are at the same potential. Screens should not be used as earth connections, metal parts should be connected to earth at a star point for safety reasons. Loop currents flow because there is a difference in potential at each end of the cable, this is due to long cable runs and earth wires of minimum cross section. There is also the issue of earthing the negative side of DC supplies and also connecting them together, again some say this is good while others say it is bad.

http://ecmweb.com/content/avoiding-p...-cnc-equipment