Sorry for such a silly topic. Ok,this's a 'mediocre' pci soundcard and I've found it in garbage:
http://mlc-s1-p.mlstatic.com/tarjeta-de-sonid … 00_032014-F.jpg

Bios recognize it, Windows 98 and Windows Xp recognize it, tried every driver (from cirrus legacy web and over here) but no sound at all, Windows got slow and fuzzy when try to play wav's, but no sound. Try to change IRQ, no luck. But I do get sound with an analog cd-audio cable setting cd drive analog output in windows. Sounds good, but I wanna know which part of the circuit board is involve in that playing (from CD drive analog output), does the signal pass through the cipset?. Is the Crystal CS4280 chip dead? could be the electrolitc caps?, which are the main power line from pci bus caps?