Mac Mini Monitor Blacking out

Hey guys,
I have a 1.4ghz G4 Mac Mini and i recently purchased a samsung 205bw lcd display. I am running on the native resolution of 1680x1050 60hz refresh rate (the recommended settings for the monitor)
Overall, the monitor works great until i try to watch video fullscreen. For some reason in VLC or Quicktime, after a while the screen begins to flicker than turns black. I ran every diagnostic that samsung has and there is apparently nothing physically wrong with the monitor. I was wondering. I downloaded SwitchResX but i wasnt sure which settings to change if anyone had any ideas..
thanx in advance

Got a Samsung SyncMaster 204B and having problems with a Belkin DVI/USB KVM switch. When switching form PC (WinXP) to mac mini I often get this blackout/flickering you all mentioned
Apple has to do something about that.
mac mini (PPC)   Mac OS X (10.4.8)  

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    After this the display problem was fixed, but the fan ran at high speed, so I did one more SMC reset as described above. Now everything is in order.   This also fixed the issue of the mac mini not waking from sleep unless the power/sleep button on the mini was pressed (it wasn't responding to the keyboard to awaken). Now it's all good.
    Hope this helps somebody else... 

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