Power surge took out LAN card?

While I was at work a power surge took out my cable modem. It wouldn't even power up. No biggie since I had a spare. I got it up and running and can connect from my laptop and my wife's computer but my computer cannot connect to the internet. In the device manager the network card doesn't even show up. I tried reinstalling the drivers and tried to do add new hardware to hopefully find the network card with no success. It has only been since this incident that my computer cannot connect to the internet and it won't go into standby (it immediately wakes up). Prior to this everything was fine. So my question is this: While I am fairly certain a power surge took out my cable modem, could it have traveled through the LAN wires and damaged my MB without damaging the router? Would a damaged network card keep a computer from going into standby? Thank you in advance for your help.

Kevin