Go to device manager, look for "imaging devices", if its not there, then the camera is faulty and needs replacement. If it is there, then reinstall the camera driver using the acer erecovery management.
Own a Predator Laptop? Then I bet you have learned a thing or two from beststevie. He has been helping out in this forum for quite a while and it's about time we recognized him for it. Thanks beststevie!