Found another possible cause for concern. A cursory glance at a boxed US model, 191T+ model revealed that the monitor comes prepackaged with a 24-pin (dual-link) cable. Did I just bought the wrong type of cable? I'm not well-versed in the computer video technology.
No analog was attached when I'm putting the dvi interface to use. tried connecting before/after a reboot but still no go. Similarly, without the dvi attached, the analog would come out well.
The monitor is capable of using two sources at one time via a toggle button. If I attached both interfaces, the digital signal would go blank where else the analog would work just fine.
as for the cable, the sales person said the cable I bought is certified samsung dvi cable (for 192T (canada/asia)) but since mine is a Korean model, he can't vouch for that. The 197T shares the same spec/drivers with 191T/191T+/193T.