I TRIES HOOKING A CUSTOMER UP TOA MOTOROLA SURFBOARD 1000 CABLE MODEM. HIS COMPUTER WOULD NOT CONNECT TO THE INTERNET. I USED MY LAPTOP AND I CONNECTED. I CONNECTED HIS COMPUTER TO DSL AND IT WORKED. I TURNED OFF AND DELETED ALL FIREWALLS ON HIS COMPUTER ALSO WITH THE SAME RESULTS. YOU WOULD THINK IF DSL WORKED THE CABLE MODEM WOULD WORK. HIS COMPUTER COACH IS PUZZLED ALSO BY THIS. I DID CHANGE MODEMS ALSO. THANKS FOR THE HELP?