Speaker suddenly silent

To play the game half of the speakers suddenly the noise issue, I re-installed sound card the first time the issue remains so to repair speakers can be repaired after the test …but then no sound on the computer I use the headphones did not take a computer ….Device Manager is not a yellow question mark in the lower right speakers are small quiet …is not just plug in speakers sound later, the administrator interface sensors will be started by 4 remark:
SENSE FRONT CONNECTOR FAILED !

SENSE SHARED SURROUND CONNECTOR FAILED!
SENSE MICIN CONNECTOR FAILED!
SENSE FRONT CONNECTOR FAILED!

1.replace the battery on the motherboard, to see the resumption!
2.there bios set up an audio line Hd is the ac97 is a set of audio bios inside, a hd is a ac97 is the general default AC97 ~ ~ give it a try motherboard has also not allowed to say ah, I bought the old board some time ago, in the lower right corner There is also a small speaker, Device Manager is no question mark is silent, unable to cope with the first USB sound card for a week.And then on to change the.