@ threephi: wha?
Comcast is a cable company.
And, an Arris Touchstone Telephony modem is a cable internet + telephone modem. You've heard of Comcast (or Bright House, or Time Warner, or any other cableco) 'digital voice' (or phone) service, right? These are how they do it.
Does he still have working phone service? If that's also dead, it's quite likely that the modem is dead, and/or the line is fried.
Status lights on the modem - what do they have to say?
Status lights on the NIC - what are they doing?
Does Windows indicate that there's a connection at all? If it does, can you open the modem's web interface ( http://192.168.100.1
)? If you can, any issues indicated there?
If Windows (and the NIC's lights) indicate that the connection is dead, try simply swapping out the NIC (or, connect your laptop to the modem.) NOTE
: if your swap the NIC (or the computer), you MUST shut down the modem first! It needs a reset, otherwise it simply won't work.