Cause of error code 66.XX.YY [TYPE] FAILURE alternates with CHECK CABLES AND CYCLE POWER

An error occurred in an external paper-handling device. 1st X = Device number in chain 2nd X = Device type 1 Input 2 Output 3 Stapler/stacker unit YY = Device specific error

Solution for error code 66.XX.YY [TYPE] FAILURE alternates with CHECK CABLES AND CYCLE POWER

Press GO to clear the message. If the message will not clear: 1. Turn the printer off, and then turn the printer on. 3. Check and reseat all cables between the printer and the specified device. 4. Reseat the external paperhandling device. 5. Replace the unit.  On 5si, 8000, 8100 check the C-link hook up. Also check the external paper handling PCA