Benq XL2410T, Can't handle 15KHz as the specs say

[droopy]

I contacted Benq support about the XL2410T and got these specs

Resolution  Pixel clock     H-sync          V-sync         H-sync (unit:pixel)  Display (unit:pixel)
480i              13.5         15.734             60               858                          720
576i              13.5         15.625             50               864                          720
640x480p      25.175       31.468           59.94            800                          640

So perhaps the Thread starter had a faulty videoport ? or something else ?

the monitor seems to support both ntsc and pal tv modes..