Tried going through Support but it looks like my phone may be completely dead so asking here as a last resort.
I’ve been having trouble with my phone turning itself off without warning at ~50% charge. Reading through the forums, I tried calibrating the battery by running it down as much as possible before charging to full. However, when it is now plugged in to AC, the white screen with a battery (with no number to indicate charging level) comes on for a few seconds, the phone buzzes, the green LED flashes once and the phone switches off. This sequence repeats and the phone never switches on. I cannot get into Recovery either - I can get to the fastboot screen but on selecting Recovery the phone goes back into a boot loop.