Go to a Mac store and try it out on a laptop with the optical out.
I don't know if it was something you said, but it triggered another thought in my head..... I must be having a bad week and not thinking very well.
I have two audio systems in my house. For various reasons, the best receiver (my Pioneer Elite) is not hooked up to a CD player. So, I was tinkering with my Optical in Toslink on my Pioneer elite Reciever yesterday with my H140 - which worked - even with the incorrect optical cable for the H140 (see above).
My Pioneer Eliter receiver is in my formal living room.
Today, I remembered I have a Sony CD Jukebox on my other older receiver in my den. It is hard to dig out to get to the back of the CD player the way I have it set up in a book shelf, but sure enough, it has a digital audio out.
Guess what? - I hooked the Sony CD player up with Toslink to Toslink cable on my D10 (with Toslink connected and headphones connected prior to turning on the D10) and........ instant music.
Great for sure, but now I am even more confused!
So, I immediately go back and hook my H140 with my custom SysConcept cable together with the D10 (start H140 playing music, confirm red light, hook up optical connect in proper order prior to turning on the D10) and ..... still no music.
So, at this point, I have confirmed the H140 works and I have confirmed the D10 along with it's optical in, DAC and Amp all work.
I have to assume if using the optical in that by default, the D10 has to use both its DAC and Amp - safe assumption.
So, the only possible remaining "problem spot" (I can think of) is the SysConcept $70+ cable.
But, I am pretty shocked about that. Considering how much tolerance my Pioneer Receiver had in picking up the optical signal from the H140 when the H140 did not even have the Toslink cable properly connected in the Mini-Optical jack.
Side note: Next DAP maker that makes an optical out unit needs to stick with Toslink optical connector. Mini optical connectors appear to be obsolete or similarly impossible to come by.
When I hook up my SysConcept optical cable to the H140 only I can "Easily" and "Clearly" see a pretty strong red light.
Just now out of curiosity, I ran a few light transmission test on the SysConcept Optical Mini to Toslink cable (nothing scientific - as I don't have equipment for anything scientific on an optical connector) - But, I used a cheap, but sufficiently powerful LED flashlight and directed the light in both sides of the connector - the light coming out of the opposite side in both cases was quite bright.... I don't know if that means much, but it sure seems to be transmitting light and quite well - best I can tell (????)
So, now that I know all of this and confirmed I "Have" been trying to turn it on correctly (correct connection and sequence of connecting and turning on), what else could be going wrong????
Over the last couple of days, I have probably tried connecting and turning on the H140 to the D10 40 - 50 times now. So many times I had to recharge both earlier today.
This is a bit crazy.
Naturally, now I am leaning towards believing the fault most likely is the SysConcept cable. But, that just seems so highly improbable.
Any other ideas or thoughts?????
It has been a rough week for many other than audio reasons. I think I must be loosing my mind. But, this seems like it should be pretty darn simple and somehow - I don't get it.