Verify the cable is plugged in properly.
If the cable was in place properly, carefully remove the cable and inspect the pins. Damaged or bent pins can prevent the machine from working properly.
If the PC side of the cable appears good, inspect the cable on the controller side.
Bent pins can be subtle and difficult to see. Inspect the cables very carefully. A pin does not need to be completely destroyed to cause a problem. Even slightly tilted pins can contact other pins when placed into the connector. If you are unsure about the integrity of the connector pins, carefully take a clear picture and email it to tech support.