Post originale di: jayeff ,
Hi @tomthomp, Did you check in ''BIOS > Advanced > LAN Power Enable'' to see if it is enabled? If it is try disabling it and the re-enabling it, save the changes and restart etc. Also is there a category listing shown in Device Manager for “''Other Devices''” at all? If so check there to see if the LAN adapter is shown there. If so, here are the latest [https://www.asrock.com/mb/AMD/B450Mac/#Download|drivers] for the motherboard.