[Coco] CoCo3 RGB w/Samsung Syncmaster 150MP/170MP

[John B]

On the CoCopedia page under "15KHz monitors" it lists the Samsung
Syncmaster 150/151/170/171 MP.  Has anyone actually used one of these
monitors with the CoCo3 using RGB?  I have a 150MP and 170MP and neither
will display a picture.  The monitor doesn't even recognize the signal.  I
have triple checked the wiring etc.  The documentation for the monitor
states the horizontal frquency starts at 30 KHz.  Is there some special
undocumented mode or modification that needs to be done to the monitor?

Thanks

John