Thunderbolt to hdmi not working after 10.10.2 update?

After the new 10.10.2 yosemite update my thunderbolt to hdmi will not connect to my tv. Tried pretty much everything but nothing will fix this.

Hello maddawgdo,
Welcome to Apple Support Communities. 
This article provides a lot of great information and troubleshooting tips that should help you resolve the no video issue with the TV connected to your MacBook Air.
Apple computers: Troubleshooting issues with video on internal or external displays - Apple Support
Cheers,
-Jason

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