Xperia Z5 doesnt properly load and starts over and over again.

[Mckill]

So my phone was on 5% and i plugged it into power. Then I went away nad it was suddenly on 1%. Then it went off and i tried to load it, but it wouldnt. After that i plugged it in again and the red LED blinked with couple seconds between the blinkers. Then I replugged it and now the LED shortly blinks red and the phone starts, but goes off imediatly and the process starts again. What should I do? Just let it load, or is it bad when it starts again and again?

[Swinx30]

hi, did you find any solution?? i tried everything and no joy. i used safe mode,xperia software repair etc. i've noticed that this problem doesn't appear untill you let the device to update the pre-installed apps after software repair. soon as you connect phone to internet and updates starts this problem is back. just spoken to sony customer service but they got no clue what is going on. i also get msg oin my screen about nfc service full etc.