The lon cable is the same as the ENI cable. The stress test failure means that all the information was sent out in packets, but not all the packets were received back stating the command has taken place. There is most likely some type of degradation happening with the ENI(lon) cable running from the bay controller card to the bridge controller card, however, there are also ENI(lon) cables running from the SLTA board to the bay controller card and a different one running from the bay controller card to the pump controller card. Make sure the plug is secure within the SLTA board as well as none of the ENI(lon) cables are crimped on the insulation within the controller cards. Make sure the plugs are secure in the controller cards as well.