I have an Asus A8N-SLI Deluxe motherboard. On this board is an nforce4
(CK804) chipset, that is sound-capable.

I used this chipset to play music when it suddenly stopped working. I looked
on the motherboard, and the ventirad on the chipset isn't rotating anymore.
Could it be that the sound part of the nforce4 fried? Its other
functionalities work all right (SATA drives and network).

See you.