Apple emac ati usb2 2005 Manual Do Serviço

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48 - eMac ATI Graphics/USB 2.0/2005 Troubleshooting
Sound In Symptom Charts
Sound In
No sound is recorded
1.
Check setup of the system preferences for the microphone.
2.
Check that the microphone is picking up sound by testing the audio in iMovie. Click on the Audio 
button. Record something. The audio bar on the screen should indicate if the microphone is working. 
3.
Boot from Apple Hardware Test (hold down the “C” key at startup). Run both quick and extended tests. 
Proceed based on any error codes given. See AppleCare Knowledge Base article 112125 - Service 
Diagnostics Matrix for Error Code information.
4.
Check the microphone cable connection.
5.
Replace the internal microphone.
6.
Replace the main logic board.