Frozen on the KINDLE FIRE logo

I hadn’t used my kindle for several months. It was dead, plugged it in and recharged it over night. Woke up and it was frozen on the “kindle fire” logo. I have done the … plug the charger in and hold the button down for 30 sec, screen goes black. I waited another 30 sec and held the button down until the logo reappeared. It will go no further then that. It is still stuck on that screen. :(