10.10.3 HDMI issue

Hello Everyone,

I recently upgraded to 10.10.3 and now my HDMI display doesn't work.

I have a macbook pro early 2011 model. The sound is coming from LG TV, but my desktop content (folders, or if I open anything) does NOT show up.

My desktop display background shows up on TV, but nothing else.

Does anyone have a solution to this or have the same issue?

thank you