I kind of have the same problem. one day i just wouldnt show up on the light, tried to tun it on, says there was a problem, tried to backdate it, that didnt work, tried system recovery, that just got rid of all pre-installed software and i had to reinstall everything. Now because of that ive not got the cam driver and it wont work, neither will youcam install without a camera being installed. which now sadly there isnt.
Im stil looking too, to find a software, or driver or whatever to get the camera working again.