Dead PinePhone 64 - does not power on at all

[Xzska-collab]

I have used my PinePhone Pine64 Manjaro Community Edition for four days. I was having an awesome time with it, trying out different distros and UIs. Everything worked beautifully at first and I'm well impressed with the current status of usability of the phone.

Now, the phone is dead - absolutely dead: no LED action, no screen (not even backlight), nothing happens anymore.

How it started:
The problem started when I had the phone running Mobian+Phosh.

I had it docked on USB keyboard/mouse, HDMI and power (although the battery did not really seem to charge, it was losing charge %).
I had updated some packages and installed some new ones.
In the terminal I gave the command: sudo reboot.
At this point the charge on the battery was probably down to a single digit (5% maybe?)
I left it in the dock.

The phone started to reboot and even power on again. On the external monitor, a very hazy version of the Mobian logo appeared (so it started to boot).

Then all went black and the phone has been dead since.

Current situation
Nothing works.
I tried the reset pin, multiple times for over 15 seconds. Removed and replaced the battery a couple of times. Held the power button multiple times for over 10/15secs.

There is no indication that anything at all is still going on in the phone.

I left the phone charging overnight (the whole night), and still no luck this morning.

The only thing that is still happening is that the phone draws power (when I connect it, I can hear coil whine starting on my cheap charging station, and when I connect it to my power bank it shows dots indicating something is sucking power from it - both charging methods were used without any issues during the first four days).


I am at a complete loss as to what's going on and I don't know what to do next... it would be a real shame if this was it and the device is now dead.

I hope anyone can help. If you have any suggestions as to what I could try or do next, please let me know!

Cheers.

My phone does not power on when the battery is on it, but if I remove the battery and plug the device on my computer the jumpdrive screen comes up, but the computer/or Etcher do not recognize the pinephone, so I cannot flash or do nothing with it.
The phone do not power on with the battery, even after the whole night charging, but it powers on when the battery is removed and the phone is plugged to the computer or outlet with the jumpdrive image, and it does nothing else. 

My suggestion is to remove the battery and plug the device and see if works and if you can do anything with it. I am still trying to figure out why the computer do not recognize the phone for me to flash it. But, I figured the battery is defective and not the USB port.

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Other than the Pinephone, I have 3 phones with a USB-C port (Nexus 5X, Pixel 3, and Aquos Sense Lite), of which only the Aquos Sense Lite's USB port is still working.

the first thing I ordered for the Pinephone was a USB-C replacement which arrived before the phone did because Ive had no luck with C ports.

one phone I got repaired and the C port broke again a month later

Do you think a broken USB-C port would keep the computer from recognizing the phone when it is plugged in?