I've been trying to fix a computer for my girlfriend's grandma and it is a hp pavilion a1423w. It has onboard sound and i havn't gotten any sound from it. I figured drivers, i found a few that were compatible, but no luck. In device manager it finds all the codecs but no device. the volume controls say i have no mixer and the computer says new hardware pci device found. Im sure that maybe the sound(not a new sound card) there is only onboard. The windows audio service is enable i've even tried to restart it I don't know where to go from here any suggestions?