I did attach the crt to dvi output with the vga adapter, and it worked. Suspecting now that the dvi input on my LCD panel was the problem, I tried connecting it to another computer's dvi output. Same "no signal" problem, but not 100% sure because that was win98 claiming no monitor was connected on the dvi. Also tried another dvi cable. Then I tried a vga cable to d-sub on the LCD panel and that still works. I don't have another dvi display to test further, but it looks like nvidia drivers may have fried the dvi input on my wonderful 20" LCD display. Would that be an "LVDS/TMDS" receiver? What a pain!