External display through MDP/HDMI not working

Can anyone help me?
My Dynex external tv is reporting "No Signal" while connected HDMI via a moshi MiniDP to HDMI adapter. It was working perfectly until I reinstalled Windows 7 over the weekend. It worked for a little bit today, and has now returned to No Signal. The display works perfectly with Snow Leopard.
Can anyone help? I'm currently running NVIDIA Verde 275.33 drivers released today.

I spent a bunch of hours working on this, and I somewhat came to a conclusion: nvidia's drivers are at fault.
The display reported no signal while using the 275.33 drivers released yesterday, and with the 270.61 drivers released April 18th.
I rolled back to the drivers provided with this macbook, which were 197 or so, and it worked. Then I tried the 267.76 drivers released in March. Those drivers worked as well and they are what I currently run.
If anyone else with a 2010 MBP 13" (or other sizes) have this problem, try rolling back your drivers to 267.76 verde drivers provided by nvidia.

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