If your board is bricked then, there are a few ways to try to recover it. I would try them in the following order:
Flash Tool Lite:
(You will find the tool and a guide on how to use it there)
(This one is the one you've already tried)
If you haven’t tested the other options yet, do it and let us know what happens.
Have you been able to use again your board?
Did you follow the suggestions from Peter?