Why did my 17"Mac Book Pro loose its ability to output video through it's adaptors?

Why did my 17"Mac Book Pro loose its ability to output video through it's adaptors? I have S-Video, RC, and an HDMI adaptors that use to work and output video. At somepoint an OS upgrade stoped their functionality. Is this something I can correct? If so, any ideas as to a path to follow?

2011 and later MacBook Pros shifted to Thunderbolt.
Pre 2010 MacBook Pros may have a PRAM battery getting old.
One of these factors may exist.   Not knowing the age of your MacBook Pro, I can't say for certain.

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