OK...mystery is at least partially solved. If you go to system
preferences, choose sound, choose output, choose digital out and set the
volume off the bottom of the scale, then you get the light around the
output port. Presumably, if you set something for the digital input
port, you might get light there also. But, it would seem that if you
are using the standard audio ports only, and have the digital turned
off, then there is no light around the digital port(s). Since it seems
you can have either digital or audio line out active, but evidently not
both at once, if its the audio that's active, then there is no light
around the digital port(s). If digital is active, it kills the
built-in speaker, since that speaker is on the line out circuit, so you
wouldn't hear chimes, beeps, etc. If you want the speaker working
again, turn off the digital ports, and turn on the standard line in/out
ports.
Kris Tilford
November 1, 2011 10:16 PM
On Nov 1, 2011, at 7:44 PM, Jack Countryman wrote:
On the machine I have here, that's a square shaped, digital out port.
Yes, that's the correct port.
There's no light on it or the similar looking port below it.
Should be red.
I don't have anything that uses those ports, so do not know if they work
Probably doesn't work. The light is the way this port communicates,
it's a "optical" digital audio out port.
Since I built this machine
from parts of others that were trashed in various ways, so its possible
that those ports do not work on this machine.
Possible, and likely.
What sort of cable or device hooks to those ports?
An optical digital cable. It's a fiber-optic cable.
If I knew, and had one, then I could check to see if they work?
Probably not, unless you have something that can accept optical
digital audio output?
Jack Countryman
November 1, 2011 8:44 PM
On the machine I have here, that's a square shaped, digital out port.
There's no light on it or the similar looking port below it. But then,
I don't have anything that uses those ports, so do not know if they work
or not... Guess I can't be of help here. Since I built this machine
from parts of others that were trashed in various ways, so its possible
that those ports do not work on this machine. What sort of cable or
device hooks to those ports? If I knew, and had one, then I could check
to see if they work?
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Kris Tilford
November 1, 2011 8:16 PM
No. It's the optical audio port on the back. It's the 3rd port down
from the top, just beneath the Airport & Bluetooth antenna ports. It
says "out" beside it. It should be faintly red all the time.
Jack Countryman
November 1, 2011 8:12 PM
On my dual 2.7 here, the only external light that's on when running is
the one near the power switch. I don't see any lights around the
optical drive. Which light is it that is always on for you on your dual
2.7 machines? Somewhere inside the machine?
Valter Prahlad
November 1, 2011 7:22 PM
I have a G5 2.7 DP, and the red optical light is always on.
But I got it used, so I don't know if this is the default.
The audio output works fine, thou.
Both internal speaker, rear audio port (3,5mm), and front audio port.
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