supermatch THZ8571SKTKW

Hello,

My original supermatch monitor (build april 1995) attached to a
PowermacG3 works fine for many years now.

I just bought another supermatch (build march 1994). Image outlines
are fine but colors are off. What is supposed to be red is blue. What
is supposed to be blue is yellowish. I also get some red colored
images, which leads me to believe the monitor color beam is ok.

http://www.monitorworld.com/ says modern videocards tend to not
properly drive supermatch monitors. My videocard is Blue/WhiteG3
original (ATI Rage 128). On the outside both monitors have 13W3 female
connectors. Under the hood everything appears identical.

Any suggestions towards fixing the color problem would be greatly
appreciated. Thanks in advance.

--
maurits