Audio not working

Something has happened to my computer I can no longer use audio in chat or hear the audio in emails or listen to Cd's. Have followed all the helps in yahoo audio wizard. Say compression codes are not set went through and reset them. Any suggestions. When i use my headset i can hear myself but cannot connect to chat.

 

Go into the control panel>system>device manager and click on the + beside sound,video and game controllers. Check for yellow ! or ? beside you audio devices. If ! ? are present you'll need to reinstall or update the audio device drivers. Have you onboard or pci sound card??

 

Checked what you said and that all checks out. No yellow ! or ?. I have an onboard sound card. Any help would be greatly appreciated.

 

Does this ONLY happen in your chat program? Which chat program are you using?

 

What OS are you running?
How long ago did this happen?

 

You or somone else hasn't muted the sound by accident.

 

I cant use audio for anything not cd's, not email, not chat, It says its already in use. And when I restart I can hear that is hangs up. But dont know how to correct it. Don't know what OS will as my husband when he gets back..went in under his ID.

 

running windows 98. This started about 2 wks ago

 

sound has not been muted

 

I cant use audio for anything not cd's, not email, not chat, It says its already in use. And when I restart I can hear that is hangs up. But dont know how to correct it.