Discovered that part of the problem i had was some RAM problem, so after be sure that the present ram was good, decided to try again.

Also discovered that it has CRM (if i well remember the name) that allowed me to chose both UEFI and Legacy.
Did try to install SO and no success - even with that UEFI kernel from here
Managed to install both Linux lite and Ubuntu, from the same pendrive - for testing (couldn't before, because of the ram problem)
In the end did try to put the ssd i've been using in the sony vaio laptop (luckily wife been forgetting it

It shows an IP on the eeeBox monitor , but when i type it on the other pc in network to access SO, says "page not found"...
I suspect it may be some lack of network card drivers?
Would be really nice to use that small pc with SnakeOil

For now, until i reach that goal, i continue to use wife's vaio - hope she keeps forgetting it

As i sidenote, i found something "weird" regarding to it: Using MPD , as soon as i press play i hear an high pitch "electrical noise" from inside the laptop

It's barely notable , but if i'm in silence in a certain head angle i can notice it. It stops if i press pause in MPD.
Even more curious is that it doesn't seems to do it with LMS and Squeezelite 1.6.4... Will report if i realize what may be that (Thought it could be a noisy cap, so added some "foam" on top of it, but kept hearing the noise.)