New
#11
Solved identical issue on my T60
I found this forum & thread after I ran into the same problem as the original poster, on my Lenovo T60 running Win 7 Pro 32-bit. The original problem was that the Ethernet device (hardwired LAN connection) disappeared from the machine. Not malfunctioned, not present but no recognized, but completely missing in action.
After reading this thread, and poking around the Intel chipset support site, I tried yet another reboot with BIOS configuration. I had noticed that the Intel Pro LAN interface ran on PCI. Looking at the BIOS config page for PCI, it lets you set the interrupt addresses. Mine were all set to "11". I noticed that another config option available was "Automatic" so I set them all to that. Completed the reboot and my Ethernet LAN interface was back in action again!
At the time I noticed the problem, I had just upgraded the T60 memory from 2GB. Who knows, the added memory may have provoked the old interrupt address configuration to fail. In any case, the new config works fine with the expanded memory.