Screen corrupt 2010 Mac Mini HDMI (Static/Snow/White Noise)

I've just upgraded my 2010 mac mini to Lion, this is connected to a projector via HDMI to a Denon amp. Before the upgrade there were no issues the picture was completely clear and was usable in all resolutions.
Now that lion has installed the display is not usable, all I can see is 99% static and a corrupt row at the top of the screen where the menu bar can be just about made out.
Nothing has changed to the setup other than installing Lion, if I use screen sharing I can see the desktop happily, the OS is fully responsive.
I haven't yet tried to connect it to another monitor as I don't have a spare, I'll attempt this over the weekend, has anyone else experienced this issue?

I've got a similar issue and seems like a few others also have problems as well
https://discussions.apple.com/thread/3196192?tstart=0
My Mac Mini wont boot to HDMI and Screen Sharing wont link in since Lion upgrade......
A makeshift solution is unplugging the HDMI during boot up, give it 30sec's - 1min...plug it back it and then it should come up.... works for me for now.....
hopefully someone has a more permanent solution or mac solves the issue ASAP....
Cheers

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