are you using the DVI port, or the analog port? ATI Cards/Drivers are
known to have problems w/ the DVI port, some lcd panels work ok, others do
not. [FWIW, my samsung occasionally has a hard time syncing up, even w/
the best settings in place; power cycling the lcd usually makes it sync up
ok. my earlier (cheap) nVidia card never had this problem at all].
if your lcd panel supports both analog and digital inputs, start off w/
the analog. once you get that working, go into the ati control panel (I
do not recommend using the Catalyst Control Center, use the control panel
vesion, as it does not require .NET) and on the Options tab you'll need
to "play with" the last 2 items: Reduce DVI Freq... and Alternate DVI
Operational Mode.
I say "play with" because there is no specific set of settings that works
for everyone. Try unchecked and checked to start, move the connector over
to the digital input and see if that works; you may need to power off the
lcd and power it back on to get it to sync up.
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Good Luck. Here's a very good site for trouble shooting ATI cards:
http://www.rage3d.com/board/showthread.php?t=33738545
If all else fails, return the card for a refund. I hate to say this, but
I have been soured to ATI lately, nVidia seems to be back on top.
