Firetv stick 4k stuck with logo

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Senior Member
Oct 30, 2016
I need help for firetv stick 4k mantis. I have rooted and TWRP was installed. A week ago when I turned it on, it stuck with Logo. I have removed the power and let it sit over nigh, then Re power. Same. I did not update anything by the way. How to recover it? By the way I can connect with adb, but shown device unauthorized.
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