Did you check volume controls to see if anything is muted?
Also in volume controls, check the slider for volume.
Check the mixer device to make sure the correct one is chosen.
Is your volume icon in the system tray? You can access volume control by clicking on it.
To check the mixer device-Options/Properties.
In addition to checking the above, when master volume controls open up, click on Options/Advanced.
IF you see Advanced in Master Volume section, click on it. Is there something that says enable? If it's checked, uncheck it. If unchecked, check it. Click Apply or Ok if asked.
This is for Windows XP-if your OS is Vista, someone else will have to assist you if you need more info.
One more thought-do you have volume control on your keyboard? If so, check to see if you turned down the volume.
After posting, I recalled an incident when I had an IBM Thinkpad (back in my 98SE days). One minute the sound was working perfectly, the next it wasn't. Spent some time trying to figure out why, then had a brilliant idea. Unhooked my speakers, plugged in headphones, and there was my sound back. It wasn't a speaker issue-they worked fine when I plugged into something else. Never did find out what caused the issue, but you could try the headphones.
Edited by Queen-Evie, 14 January 2008 - 01:05 PM.