It does look the onboard LAN controller has a problem.
I'd recommend clearing the event log and loading the BIOS default settings as follows:
1. Once in the BIOS setup utility, press <F9> to restore BIOS default settings.
2. Reset any customized BIOS settings.
3. Clear all DMI event logs by setting the option to "Enable", which is located in the Advanced/Event Log Configuration section of the BIOS Setup utility.
4. Press <F10> to save the new settings and reboot the system.