Hi @ariston
My best recommendation is to ensure that you have the necessary driver for that motherboard. It is quite possible that there is a missing driver for ethernet/wifi on your device. Please check ASUS's website for ethernet/wifi drivers, download them to a USB and install them on your device. Then try connecting to the internet.
Try looking up the specific motherboard that you have on the ASUS website or a search engine.
----------------------------------
If this is helpful please accept answer.