Two-days old phone (Xperia M4 Aqua 16 GB, my first Sony), charged successfully yesterday afternoon, but since last night plugging in the charger initiates shutdown.
The red light signal flickers for a couple of seconds, as if the battery is empty, and it's "proper shutdown" (with "shutting down" text etc.), and not just immediate power off.
Battery is around 50-60 % full. Nothing has changed, to my knowledge, between the successfull charging and the failure now; no updates (runs Android 5.0 and doesn't show any missing updates), and nothing physical.
Same result if I connect it to computer. The USB cable itself doesn't do anything, however; only when there's charge moving.
Tried with 0,1,2 SIMs, and with and without memory card; no difference.
Since the problem persists also when I try to connect it to my computer, I can't do any of the computer-based things (firmware updates etc.) that were recommended for other powering-down problems, and since I just managed to install and configure everything, I'm not happy to hard-reset and install everything again. And if I do have to install everything again, I'm strongly inclined to return this one to the shop and get another brand 😕 So what should I do?
