you wrote, that you had tested these components on an asus barbone.
have you really tested each of them (ram, cpu, hdd)?
probably there isn\'t much magic in putting a barebone together. if you have tested all components and they all do work in another barebone, from my point of view there is only one component failing: the MSI barebone. simple as that. returning it once and receiving another one is no insurance for a proper working system. i returned my s262 twice and actually the third one has a few problems, too. so just decide if you give it another try.