So I put in another model MSI motherboard in place of the older MSI motherboard. The new setup booted right up with the original mythbuntu hard drive and everything was working great for about 2 hours and then the network interface just plain stopped working. I get flashing lights on the RJ45 Ethernet connector, everything else on the network is working just fine.

So my question is, since I changed mother boards do you think I need to reinstall 12.04 mythbuntu as new drivers need to be installed, or is there another way to sort this out......?