Rebtech ethernet not connecting after rig change

Been running hiveos on a rebtech motherboard fine for months.

Today I moved my setup to a new frame but after rebooting it won’t connect ok ethernet. No activity led lights even show on the mobo ethernet port like a normal connection. The green led light comes on the router port though.

I cant get hiveos to connect due to this.

I read one thread that said if you power up with ethernet lead unplugged then wait until hive is up and running then plug it in. This worked once and i was mining for 45mins until it dropped again.

Now im back not able to get it connecting.

Any help very appreciated. Thx