1. 電腦裏的聲卡安裝好了嗎? 開機時有聲音嗎?
2. 麥克風打開了嗎?(start-All Programs-Accessories-Entertainment-Volumne Control-Options-Properties, click recording button, and make sure that microphone is checked.
3. Open Sound Recorder (Under Entertainment) and press record button and speak into your microphone and see if there are any waves while you are speaking?
If yes, speaker has the problem, if no replace the microphone.