MY best advice would be to upgrade from the 50ohm coax to cat5 ethernet.
Unfortunatly, that is not what you want to hear, so I'll do my best....
Things to try:
- Check the convertor which converts COAX to Cat5
- Check the configuration of the Cat5 PORT that connector is hooked up to
- Check the configuration of any programable switches on your network, incase they have been reset to defaults after the storm.
- Check the configuration of your router (as above)
At work, we use Cisco routers, cores and switches which are all programable.
If I make changes to one of them and dont remember to WRITE the changes then everything runs just fine right up until the power is interupted, then the unit will drop back to it's 'last save'.
There is every chance this COAX network is plugged in to a programable switch / router which no longer has the correct details.
HTH.