Hi there!
Sorry for my english in advance,
I searched a lot for a solution since i suffered from the same issue,
nothing helped but with some experiments the following simple steps solved my problem (intel hd 3000 on 2nd gen which they say is not supported any more):
1. Connect the HDMI cable to the TV.
2. Device Manager-> Display adapters
3. Right click on "Intel(R) HD Graphics xxxx" (Your graphic card) and disable.
4. Right click again and enable.
Thats it! don't be skeptic (-:
after trying too many drivers unsuccessfully, i was suprised how simple was that.
Note: You need to repeat those steps everytime you connect your laptop to the TV