After installing last update my player is not turning on, what should i do?
If all else fails try a factory reset?
In your instructions there are steps for performing a 'forced restart', or 'factory reset'.
To perform a factory reset ("Caution: all data will be erased!") hold down the volume + then simultaneously press and hold the power button for a few seconds. An Android lying on his back with open chest will appear with the words "No command".
Next press and hold the power button, then the vol + button (again both end up pressed simultaneously).
Then use the volume - button to scroll down through the menu (vol + scrolls back up if you go too far down) to "wipe data/factory reset" and use the power button to select.
Hiby says this will erase all your data.
I have no idea if this will also require you to go through all the OTA update steps again.
I had to go through these steps when I first got my R5, due to carelessly starting the process by accidentally pressing both the power and vol + buttons while fitting the case, but it all went smoothly and as described in the 'manual' (poster more like, I really don't like poster style instructions, but it's a very small complaint when everything seems quite well written, and decent English).