Ken Blake posted:

Jacks for loudspeakers are usually on the computer, not the monitor.

I followed Paul's advice which activated the monitor headphone jack.

The output with both the vga & hdmi cable was the same at 1920x1080.
With hdmi I also get sound out of the headphone jack on the monitor.

I found switching to sound outputs was different than I expected.
I had expected that merely plugging in the headphone jack would instantly
disable the speakers, which is what happens with my external speakers
(which also have a headphone jack).

That would have been a problem with this monitor because just to plug in
the headphone jack requires more effort than you want to turn the monitor
around, flip it upside down, and find the tiny headphone port in a crevice.

I was worried that it's pretty hard to insert the headphone jack into the
back bottom crevice of the Flatron E2341 monitor so I was very happy to
find out that there is a software choice to switch between 3 outputs

E2341 (NVIDIA High Definition Audio)
Speakers (High Definition Audio Device)
Digital Audio (S/PDIF)(High Definition Audio Device)

The first of those 3 switches audio to the headphone jack on the monitor.
It's nice that this has a software control so that I can leave the
headphones plugged into the monitor full time.

The second switches to the external speakers I connected to the desktop,
where the sound plays out the speaker if no headphone is connected to those
external speakers, but the sound output automatically switches in hardware
to headphones if I connect them to those external speakers. So I can't
leave the headphones plugged into the external speakers full time.

I have no idea what the third choice switches to though.