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Helpful answers
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Aug 25, 2015 3:10 PM in response to eltadminby Drew Reece,What do you mean by 'volume'? Sound, disk volumes or something else?
If you want us to help you we need to understand the issue & steps that got you to this state, please explain more.
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Aug 26, 2015 12:49 AM in response to eltadminby K Shaffer,If audio, have you tried an accessory to test the headphone or audio port to see if by
inserting then removing the accessory, if the speakers work again? There also is a
way to Mute the sound including startup tones, etc, in the System Preferences panel.
Also, the System Profiler shows hardware and software, so you may be able to see
if the audio segment of the system hardware appears to be recognized by your Mac.
To be clear, there are several kinds of issues that can befall a computer, so to detail
them and what you were doing (or trying) at the time you discovered the problem, it
is wise to state the history, for those of us who happen late on the scene & can't tell
what's going on.
Sometimes a reset of the PRAM (aka NVRAM in later Macs) may help speaker volume:
• How to Reset NVRAM - PRAM on your Mac - Apple Support
With a PowerPC (not Intel-based) Mac, you could attempt to reset the PMU or power
management unit, to see if that helps allow audio or other expected items to resume.
Be sure to locate the model and version information that best matches your Portable:
• Resetting PowerBook and iBook Power Management Unit (PMU) - Apple Support
Good luck in any event...!