BPI R3 no wan/lan connection on openwrt

Hello, i recently brought BPI R3 and installed openwrt 24.10.5. It works fine, but after reboot i has “no link” on wan and lan ports. I tried to load clean image from sd card, but it doesn’t help. If i plugin ethernet cable there is a green light on port with rare blinks, but on pc i didn’t get address (ping 192.168.1.1 returns “network is unreachable”). Via wireless 5g and 2.4g dhcp works fine. Had someone something similar?