20503 Views 11 Replies Latest reply: Sep 7, 2010 10:53 PM by Fran Lans
I have the same issue. Although I'm starting to think it's a hardware problem.
I have no sound from either my internal speaker or from headphones, opening garage band brings up an error code "Core Audio: Selected Driver not found. (-10202)"
Pressing the volume buttons on the keyboard flashes up the level indicator on the screen but it does not change, and also a little "O" with a line through it appears underneath. The Sound Preference panel says "No Output Devices Found", and the volume slider is grayed out, set to max, with a grayed Mute box ticked.
Is yours the same?
I'll do some more digging and let you know what I find?
I have exactly the same issue! and what's more, apparently we aren't the only ones... a whole bunch of folks are facing this problem, so it can't be a hardware issue... i think it's a bug with some software update - perhaps iTunes. Will also check more Mac user fora, and keep you updated if i do find a fix.
I'm having a similar issue with my new MacBook Air. My speakers work to play movies, etc, but none of my alert sounds or iChat sounds work. I rebooted and it worked fine, but then they stopped working the first time I woke the computer up after the reboot. Am I correct in guessing it's a software issue because the speakers do work with other applications?
I found this answer through Apple's online support. Did it and my sound returned!
Online support indicates that the PRAM and NVRAM need to occasionally be reset.
Resetting your Mac's PRAM and NVRAM
2010-06-25 21:25:31 GMT
Portable Computers, Desktop Computers
This document explains how to reset the parameter random access memory (PRAM) and nonvolatile RAM (NVRAM) on Macintosh computers.
Important: If your computer does not retain parameter RAM (PRAM) settings when it is turned off, this generally indicates that the battery needs to be changed. Refer to Macintosh Family: Batteries and Part Numbers.
Resetting PRAM and NVRAM
1. Shut down the computer.
2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
3. Turn on the computer.
4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
6. Release the keys.