Re: FX5900 blank screen
It may be feeding video to the wrong port. I've had nightmare sessions where I couldn't get the machine to boot to VGA after using a TV-only setting. I don't recall how I fixed it, only that it can be a scary problem.
have you tried DVI and VGA and SVideo? Does it display proper boot/POST on any of the three ports?
I used to drive a Heisenberg, but whenever I'd glance at the speedometer, I'd get lost.