Hi, All.
i own the TinyScreen module few days only. But today it stop working. Just a black screen only.
And all samples
https://tinycircuits.hackster.io/tbatey_tiny-circuits/tinyscreen-assembly
are not displays anything also.

How can i test my module before to decide that it's really damaged?

Definitely sounds like you might have a bad board- shoot an email to info@tiny-circuits.com if you haven't already, we'll get you a replacement if one is needed.