I have a CV64 (not the "3D" variety) that shows as working in Early Startup, but refuses to work, no matter what I do to it. By that measure, a 'non-working' indication following a reboot does sound pretty fatal. Provided it is not a contact/configuration issue (see what other said above - check also that the daughterboard makes good contact), I'd reckon it's broken. Where did you get it from?
