Exact same issue started 2 weeks ago. Original post was May 2016, now we are March 2018 but no "official" response from Presonus support on this problem?
I live in Canada, the "rep" is Jam industries in Quebec, they told me to contact a local shop for repair as they did not want me to ship it to them. Contacted local shop, they are "authorized" but not for repairs of items outside of warranty. So, it appears that I cannot get it repaired even if I wanted to. Now shopping for a new interface. Presonus is still on my list, but it's way down on the list, below RME, Antelope, Focusrite etc.
It's too bad, my 16.0.2 worked flawlessly for 7 years, and everything else on the mixer seems to work, just no inputs.