Gah audio device problem

[xxleloxx]

My audio doesnt work. ONe day it was, the next it wasnt. I have tired to follow other posts on here for help but it hasnt worked. Under sound, video and game controllers the C-Media AC97 audio Device has a (!) next to it. I tried re-intsalling it but that didnt work. I also tried to find updates for it there were none.
The troubleshoot didnt work either
can anyone hlep?

 

[Matthew DeCarlo]

Start > Run/Search >devmgmt.msc > Enter

See anything with a yellow question mark here?

What is your PC's brand/model?

 

[xxleloxx]

nope no questionmark, but there is a exclemation mark on the Media AC97 audio device. Um its a acer

NetBIOS Name Logical ACER-86E9BF2E61

 

[xxleloxx]

or is this the brand model? Aspire T135

not sure which one you meant sorry.
Thankyou soo much for helping me btw