Now you need to check your machine. The MB990 has only one audio interface, which can be output or input. It is adjusted by setting. Also, it depends on whether the driver is installed correctly In addition, if you buy an Apple computer that has removed the Apple system installed with XP, you are advised not to buy it
First, rule out whether your stereo is broken!(Did you notice the audio power connection???) Then consider whether someone has touched your computer and set the audio option settings, (you can take it from the control panel to see if the relevant equipment is disabled) 1. First, right click the trumpet icon in the lower right corner - Play Device to enter the sound setting menu, 2. Right click the "Speaker and Headset" option, click "Set as default communication device", 3. After selection, click the "Communication" option, set "When Windows detects communication activity" to "Do not perform any operation", and then apply OK. 4. If the fault persists, we recommend that you restore the bios, When the HP (or COMPAQ) interface appears when you power on (or restart), keep clicking F10 to enter the BIOS interface, select the Exit option, select Load Setup Defaults -- yes, and then select Exit -- Exit Saving Changes -- yes
When Apple plugs in the earphone, it is necessary to change the audio port of the voice item in the preference settings. What's the reason for deleting Apple? It is recommended to reinstall the Mac.
