MacBook Video Out problems.

Hey all.
Bit of an issue regarding my Macbook. It's a 2ghz Duo With ram upgraded to 4gb by myself. For some reason the video out on my Macbook has decided to stop working. Is it possible that it's hardware related? I have tried the following.
1: Bypassing my Onkyo TSR 609 amp straight to TV
2: Lowering resolutions (although 1080i and p was fine)
3: Bootcamping into windows to see if its an OSX issue. (my friends Samsung laptop works just fine through all the various combinations)
4: Punching it.
Im at a loss now, was working fine, got my new amp and was working fine through that for a week (havent changed any settings on it, and as I said same issues straight to TV which is a 42" Sharp XD1E) and the picture just comes out as multicoloured digital noise but you can just about make out whats on screen.Its a fairly weak connection on the MiniDVI port on laptop itself, It's connected via MiniDVI to DVI/HDMI dongle. I have also swapped out cables. It's not the amp as my PS3 blasts out 1080p with NO issues, please help!

Your Mac runs maintenance in the background for you.
Command + R gives you access to restore, repair, or reformat the drive using OS X Recovery
No idea why that was suggested.
You may have a third party video player installed that's causing an incompatibility issue.
Check these folders:
/Library/Internet Plug-Ins/
/Library/Input Methods/
/Library/InputManagers/
/Library/ScriptingAdditions
~/Library/Internet Plug-Ins/
~/Library/Input Methods/
~/Library/InputManagers/
~/Library/ScriptingAdditions
The first four locations listed are in the root-level Library on your hard disk, not the user-level Library in your Home folder.The tilde (~) represents your Home folder.
To access the Home folder in OS X Lion or Mountain Lion, open the Finder, hold the Option key, and chooseGo > Library.

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