Camera not working and light blinking after upgrade

Question

After upgrading to Mavericks, the built-in camera on my MacBook Air (mid-2013) has stopped working in all applications. When I start an application that uses the camera, the image does not appear, and the camera light blinks rapidly until I close the application. Console shows the following messages:
11/24/13 11:34:08.000 a.m. kernel[0]: AppleCamIn::power_off_hardware
11/24/13 11:34:08.000 a.m. kernel[0]: AppleCamIn::power_on_hardware
11/24/13 11:34:09.000 a.m. kernel[0]: ISPCPU: ERR: ./H4ISPCD/filters/IC/CImageCaptureH4FSM.cpp, 452: FlowIC00: MIPI error (interrupt source = 0x8)
11/24/13 11:34:09.000 a.m. kernel[0]: ISPCPU: ERR: ./H4ISPCD/filters/IC/CImageCaptureH4.cpp, 2503: FlowIC00: Perform error recovery (1).
The latter two messages repeat until I close the application.
This is not the same problem as the Skype camera issue that was resolved with a previous update. I have tried resetting the NVRAM and PMU, reinstalling Mavericks, and using the guest account.
This user has the same issue: https://discussions.apple.com/message/23721483#23721483
Any help would be greatly appreciated — I would really like to have my camera working!

Answer 1

Hello grmurchison,
Thank you for providing the details of the issue you are experiencing with your built-in iSight camera.  You have taken some really great steps to isolate and troubleshoot the issue.  I found an article with a couple of additional steps (you can skip the steps you have already taken):  
Built-in iSight cameras
These steps are for iSight cameras that are built into a computer, such as the iMac G5 (iSight) or later, the MacBook, or MacBook Pro.
See if the issue is application-specific.
Try another application (iSight works with applications like iChat, PhotoBooth, and iMovie HD 6) to see if the iSight camera exhibits the same behavior in all applications. If it only happens in one application, try reinstalling that application.
See if the issue is user-specific.
Test your iSight camera in another user account. If the issue only occurs in one user, the issue would be isolated to user settings.
Find out if the computer recognizes the iSight
Check System Profiler (in the Utilities folder, inside the Applications folder). Under the USB header, check to see if the iSight camera is detected.
Reset SMC or PMU
Reset your computer's SMC or PMU, and then check System Profiler again. (SMC reset instructions for iMac G5 (iSight), Intel-based iMacs; PMU reset instructions for MacBook and MacBook Pro.)
If your built-in iSight camera is still not behaving correctly after trying all these steps, you may need to contact Apple or an Apple-Authorized Service Provider for service.
How to Troubleshoot iSight
http://support.apple.com/kb/ht2090
Thank you for using Apple Support Communities.
Best,
Sheila M.