Currently Being ModeratedOct 22, 2013 6:59 AM (in response to Tim Baker)
Sometimes when doing a SMC there is no indication of anything, at the bottom of the the instruction page you will see that the power adapter may change states.
You can click on the Apple logo holding the OPTION key, then click on system info, in the left side bar click USB.
The pane that comes up should be "USB Device Tree" look and see if it shows Facetime HD/iSight camera (built in) is recognized, there will be info as to model, vendor, etc...
If not recognized, you may want to take it in to Apple for a diagnosis