Black Screen with MINI and ADC Display

MacMini OS X 10.5
Bootcamp
Win XP
G4 OS X 10.4.11
Apple 21" Cinema Display (ADC)
1600x1024 32-bit color
Apple ADC power adapter
Dr Bott MoniSwitch mini KVM Switch
ADC-DVI Adapter
I just installed XP on the Mini and I'm having occasional problems with a black screen on start up or when I switch OS. When this happens, I'm unable to get video from any OS or either computer. The only solution I've been able to come up with is to power all systems down and un/re-plug the display from the power adapter.
I've seen the article regarding black screens under NVIDIA gfx cards but that doesn't apply to my case.
Any ideas?
Thanks.
Dave

Oh, sorry, didn't get that. That monitor was actually called the 22" Cinema, not 21". Apple had a 21" CRT but I think that was called a Studio Display, so I got confused.
So sometimes it works correctly at 1600 x 1024 under Windows (Bootcamp) and sometimes it doesn't? Is that correct? Those times when it is giving a black screen, have you considered trying to establish a VNC connection to the mini from another computer on the network? You might find that the wrong resolution is being sent to the ACD those times when you get a black screen. Though that doesn't really tell you why it's happening, it's a starting point.

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