Built-in iSight for MacBook Pro OS X 10.4.11 Not working

This was working before, and all of a sudden it won't work! I can see it in the system profiler under USB, but in PhotoBooth it comes up as a green screen and in applications like Skype and iChat I just get a black screen (or once it showed that I did not have any video connected). All of my software is up to date, I have restarted a dozen times, I tried to take the battery out, but nothing works!
Let me know if anyone can help!

Hello MOVA
Thanks for that new info.
If you have not installed any new hardware since your Mac worked correctly, it is possible that your problem may be hardware related. However, here are a few other ideas that you can try before you take your Mac to an Apple Technician for service.
To avoid possible conflicts while you do your testing, disconnect all unnecessary peripherals, restart your Mac, and make sure you do not have any running "Login Items" that might conflict with iSight apps.
(1) It is worth trying another account. Use System Preferences to create a new account and test there. It will not take long and, if a new account corrects your problem, it is a much simpler remedy than some other possibilities.
(2) It sounds like you have followed the suggestions in the Troubleshooting link for the reset. If you are not CERTAIN, repeat the process to be sure.
(3) Some iNtel Mac laptop users have reported success after unplugging their Macs and leaving the battery out for half-an-hour to overnight. You might want to try disconnecting EVERYTHING, including both power and peripherals, for a few hours to see if it help you.
(4) If someone might have removed the QuickTime file shown in MacOS X Hints article to purposely disable your built-in iSight, you will need to restore the file to its correct location in order for your built-in iSight (or any other USB camera) to work.
(5) Apply the 10.4.11 Combo Updater. Use the following method:
• Backup your Home Folder, or at very least, your important files.
• Repair permissions. (Click here if you need help.)
• Then download and apply the Mac OS X 10.4.11 Combo Update (Intel).
• Finish with another Permissions Repair, and then check your iSight again.
Users have reported fixes to a variety of audio, video, connectivity, and software conflicts and unreliability issues after properly applying Combo Updates.
We will watch for your status update (and, hopefully, your notice of success.)
EZ Jim
PowerBook 1.67 GHz w/Mac OS X (10.4.11) G5 DP 1.8 w/Mac OS X (10.5.1)  External iSight

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