Background:
Last week I was attempting to update both of my Tivo's to v1.6.2 and changeover to use the new server.
Both boxes are now running v1.6.2, but I've somehow managed to screw up the network connectivity on one of the boxes (previously running v1.3). This probably occured as a result of me trying to change the Turbonet mac address (even though I was able to do this fine on the other box).

I've connected to the tivo via a serial cable and can see that eth0 doesn't appear in the results for ifconfig. I tried trolling through /var/log/messages but I couldn't see anything obvious.

I was able to run net_config_tivo again, but I don't know if this program actually interacts with the Turbonet card or just changes the config files.

I'm hoping that someone can offer some guidance on other log or config files to check.