I need you to open the compute

r case and see where the speaker cable is plugged into.

If it's a card plugged into one of the slots on the motherboard, please unplug the speaker cable, loosen the skrew and take the card out carefully. Take a close look at the card and look for the manufacturer and model number on the card and post here.

Otherwise, if the cable is plugged to the socket looks built on the board, please look around the motherboard and look for a serie of big letters and digits. They are normally close to the center of the board. They are the manufacturer and model number of the motherboard. Post here when you found them.