I've had ethernet and other tasks running well on my MCF52231 'Digibutler' board for some months and suddenly there is no ethernet access. The startup looks good reporting 'Ethernet started, Iface: 0, IP: 192.168.0.151' and a led shows on the router, though the router doesn't recognize the board. There is no response at all when I try to access the board with IE. I've tried different cables, direct connection with X-over, reflashing etc. Is there something I can do in debug, say to find if the chip is at fault? What signals could I measure with a scope? Any help would be appreciated.