Check connections, wire and pins
- Check that all connections have been made properly. Are all the coloured wires connected to the right terminals? Is the exposed copper wiring making a solid contact with the right terminals?
- Check the wire. Is it broken or split? Is it pierced by a staple, nail, screw or other object? If it is, replace the entire section of wire from end to end.
- Check that the pins or connecting terminals inside the jacks are not touching each other and that a jack itself is not damaged.