Please help noob user: Unrooted kindle fire hd 7 bootloop with broken power button

I have been having problems opening my device for months now because the power button isn't working anymore for me. So when I open my Kindle I just usually plug the charger. Then one day, I don't know what happened, when I opened my device it was so slow and the launcher (original) is always not responding. So when I finally manage to go to Settings > Device > Restore Factory settings... my account was deregistered and I waited for it to reboot. When it did, it was the same. I didn't think that the Reset settings I did, worked. My power button is broken, right? So what I did next, I opened the back case of the device and tried to push the power button with a pin, then all of a sudden it restarted and ended up being stuck with the Kindle Fire logo. Anyone could help me with this problem? I'm still hoping that it could still be fixed. Please reply, any help would be much appreciated. (My KFHD is the first gen btw)

and I couldn't reboot again the device, it's still stuck with the logo