Where is the trim switch set can't see from pictures.
Amber Light / No Audio Turn trim switch out of "Load" position.

I've tested the trim at all the settings: flat, half, full ... even at load (but the light did not turn amber)

I also tried all the crossover settings.

the only time I see amber is upon power up, it lights up 1-2 seconds then turns into this color. is it the same with yours?

When powering up mine goes from amber to green within 1 second.

thanks Homedad, at least now I'm sure that's the order of things ... and that amber is NOT yellow - I have trouble distinguishing color

Mike:
your pics showed green color.
My EP-500 when power-up the led turn amber->green in 1 second.
In trim settings, no color changes in whatever postion.
I also can't feel the difference when I changed the trim settings.
I don't know if mine one is working normally but mine has sound. Hope this can help you.

My vote on your LED color is green in just about every pic, especially the one in the dark. Definitely looks green to me. You should be getting sound however if it is green. Are you using the same input cable from your Velo sub that works? That would eliminate the source as a problem.

yes I am,

well I emailed brent right when I posted those pics, that was 18 hours ago. the office hours in Canada has winded down (by my calculations). in short, its either my email was missed or he's asking the technical guys, I just wish I was sent an email confirming receipt.

somebody suggested I use NO flash and sunlight white balance to show the led's true color ...

In my opinion,

green
green
green, and
green

Yes you do have a green LED and just courious as to your purchase of the 500, did you order it from Axiom, as in this was a new sub and not used ?