Startup sound does not sound

minor annoyance, but i no longer hear the start up sound when i hit the power button. i usually have my imac hooked up to external speakers which are turned on before the imac are but are usually not turned off. i tried unplugging the external speakers before turning on the imac, and i did not hear any sound.

When you unplug the Headphones, in your case the External Speakers from the Output Jack the Sound Preference should change back to Internal Speakers. If it's not then the micro switch in the headphone jack may be stuck or broken. Try inserting a different 3.5mm plug in the Output Jack and jiggle it around a little then pull it out to see if you can get it working again. If it still does not work then it may be permanently stuck or broken and you need to take the iMac in for service.

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