GA-EP45-UD3P-no sound

I have had trouble ever since I got the machine(8 months ago).I had 3 sets of 2 speakers and they would work for a little while and then die.They would work in other computers but not mine.I finally borrowed my friends--Creative inspire 5.1-5200 multimedia speakers system. I plugged in all five speakers and sub .After I did a cold restart I was only able to get sound out of one speaker. Do you think the sound chips are gone and the only way to get sound is putting in a sound card. Or would it be worth sending back to Gigabyte to fix. In device manager no red or yellow tags.The only think I have wrong is in the event viewer/system--I get event ID 7023,20035,every few times a minute(don't like but haven't found out why).This started about 1 month ago.



GA-EP45-UD3P,VGA HIS H485QX512P, CORS TWIN2X4096-8500C5D,
INTEL/C2D E8500 3.16G 775 45N,
SS-650HT 650W ,
Hitachi HDS721010KLA330
IT/ ST 7K 32M SATA2 ST31000340AS,
Plextor PX-800A (IDE),
ATAPI iHAS120 6 (SATA)

I tried uninstall ,cold boot and reinstalling,I didn't get any sound.Now I don't even get sound from one speaker. Even went back to old image of 4 months ago and still didn't work.I guess its a sound card.By the way should I uninstall the realtek sound card drivers(I believe I should).

It did look like that but no sound.Right now I tried before installing new drivers and I now get no sound out of any of the speakers.Before I did have sound out of at lease one speaker.