Display problem when connecting laptop to TV via HDMI

I have a Satellite L500-19X and when I connect the laptop to my Sony Bravia TV, the display is constantly choppy.
I've tried changing the refresh rate but that hasn't helped. The HDMI cable shouldn't be the problem because it works fine with my Xbox. The problem is there during both duplicate display and extend display options.
Anyone else experiencing the same problem and have found a fix?
Thanks

> The problem is there during both duplicate display and extend display options.
And when you see desktop on TV only?

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