Hey guys, I just got LG l9 from my friend but it is (I am afraid, not knowing much about mobiles) bricked.
When I turn it on it says:

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Secure booting unsuccessful!
Cause:
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and after that it turns off. If I charge it it turns on and shows battery charging. At combination of Volume+, power button it goes in Recovery mode.
It shows "This mode is for data backup service center. After removing and reattaching battery, press power key to reboot and keep using phone" and from there I can't do anything, just able to take out battery.
If I try combination of Volume-, power button it shows little android and loading bar, after few sec it restarts and shows booting unsuccessful.

I am not sure what he did with it, but pretty sure he rooted it. Is it possible to fix it, hope someone will provide me some help
Thanks !

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