Are you sure your network hookup is working?
3Com PCMCIA Ethernet Adapter Issues
3CCE589ET: lost link beat problem (Claude Lefrancois)
Date: 2000, Aug 30
From: David Hinds <firstname.lastname@example.org>
> eth0: lost link beat
The message points to a network connectivity problem. Have you ever
had this card work, under Windows maybe? Are you using a good
ethernet cable? Are you sure that the port you're connected to is
to: "Are you sure your network hookup is working?"