Default [Q] Kindle fire 8.9hd won't turn on (bricked)


I read a lot of posts about this problem but i can't found something helpfully. I tried root my kindle fire but something went wrong and now I can't turn it on, I can't do anything. I tried to use any programs to unbrick but always the same problem- error- device not found. I bought factory cable and still the same situation. I don't now what I can to do. Maybe someone had the same problem and have any idea?