In Theory similar input has been posted before, and you are omitting some important points.
[quote]
This may help some members having difficulty with controlling the Volume of the Power On Self Test [POST] Sound.
Please note the advisory ‘…controlling the Volume…‘ rather than disabling or switching off, because the purpose of this sound is to advise the user that all is well in the ‘engine room’...............
The control is by means of > System Preferences > Sound > Output tab:
Selecting Internal Speakers, and in my case moving the Slider to the position shown to give the ‘Gong’ a low volume:
The statement, in the above screenshot, ‘The selected device has no output controls’ is perhaps somewhat misleading. It may be missing the Balance Controls of the Line Out facility, but it certainly has a Volume Control.
[end quote]
I goes on to explain how changes with this setting does not affect the Line Out Volume amongst other things.
On the Volume setting shown above, with less than perfect hearing, the ‘Gong’ is reduced to a very acceptable but reassuring level.
Those with good hearing may need the Slider moved further to the left, every time the Sider is adjusted you should hear a ‘squeaky click’ and this gives an idea of the sound level at that the chosen setting.
If POST fails the ‘pop up screen’ may well be the entire display in plain Gray with no indication of what is wrong or what to do, if the POST sound is NOT heard it will alert you to the fact that something is awry.
Knowing what to do before such an eventuality seems like a good idea?
The ‘reassurance’ comes from the knowledge that the POST has completed successfully and all is well with the Mac.
The choice is yours.
EDIT:
billearl sorry to repeat what you have just said, my post was in progress at the same time as yours. But I guess there is little harm pointing out these things over and over because the message might get through eventually?
Message was edited by: Froggy Grodkin