Often your external web camera has an application to setup the camera so the port ID is set. As you have more than one port you could try plugging it into the other or use the App to reset it.
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If you are talking about the systems iSight camera that would be a cable connection on the logic board
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If you are talking about the systems iSight camera that would be a cable connection on the logic board. Review Step 13 in this guide [https://www.ifixit.com/Guide/MacBook+Pro+15-Inch+Unibody+Early+2011+Logic+Board+Replacement/5899] see if reseating it solves the problem.
Often your web camera has an application to setup the camera so the port ID is set. As you have more than one port you could try plugging it into the other or use the App to reset it.
+
Often your external web camera has an application to setup the camera so the port ID is set. As you have more than one port you could try plugging it into the other or use the App to reset it.
+
+
If you are talking about the systems iSight camera that would be a cable connection on the logic board
Often your web camera has an application to setup the camera so the port ID is set. As you have more than one port you could try plugging it into the other or use the App to reset it.