No sound , help

PC Home build
Asus A8N 32 sli deluxe
Bios AMI 64-1009-009999
Chipset nF4-sli x16
AMD 3.5+ (2.20ghz)
Corsair twinx 1024-3200 DDR400mhz SDRAM 2x512mb
MSI 6600gt 128 PCI-E
Maxtor sata 160mb
PSU 400w
XP sp2
X45

Mobo onboard sound.

Last night the sound worked OK, this morning not a dicky bird.

Relinstalled latest drivers, and tried everything else to no avail.

These are the drivers in System Hardware. The first four in their properties the "Hardware usage" is grayed out, whilst the rest can be selected on or off. All show "working properly" :-

audio codecs
Legacy audio drivers
"-" Video Capture devices
Media control devices

MPU-401 Comp. Midi devices
Nvidia(R) nforce(TM) audio Codec Interface
Unimodem audio device.


The Volume control in the R/H bottom corner of the screen does not show up, BUT when I click on it in the Programs>Assessories>Entertainment, an error shows saying ""....no active mixer devices available, install from Add Hardware...."

When I do that each one says "working properly".

No, it was enabled, but just reinstalled winxp and sound came back.
Thanx