Any frequency deviation will cause the monitor not to sync.
The 59.98 frequency is probably close enough. The other
is most likely the problem. As far as impediance is concerned
most video cable is 75 ohm (for those monitors that need
matching impediance). Hope this helps.

-Matt

> > Your DG PN005034269 number matches mine in my AV530. And I know that
> > is a DG part number. My monitor is a Color Display Model number 6487.
> > My monitor is the same chasis used in a lot of older SGI monitors
> > although I can't tell you who manufactures that particular chasis.
> > I was hoping to find a jumper for setting the output frequency but
> > no luck.
> >
> > http://www.monitorworld.com/Monitors/datageneral/6487.html
> 
> mine is Sony GDM-1601/08. as i see at these pages, its frequency little
> differs from your ones:
> 
>   http://www.monitorworld.com/Monitors/sony/gdm1601.html
>   http://www.monitorworld.com/Monitors/sony/gdm160106.html
> 
> > That is a link to the specs of this monitor. Maybe you can find
> > another monitor with similar sync frequencies.
> 
>   mine -  H Freq/ V Freq: 63.34khz / 59.98hz
>   your -  H Freq/ V Freq: 64khz / 60hz
> 
> do you think this is different enough to do not work properly?
> could be there problem with 50ohm cables? (i doubt it, but i want to be sure)
> 
> i am not sure if this machine was used exactly with this monitor and i have no
> chance to find it out..
> 
> regards,
> 
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