Pinebook Pro not powering on / not booting (tried things listed in wiki/forum)

[kiefer]

So far I tried a bunch of stuff that was suggested in the forum, or the wiki, but so far nothing has made the device turn on or show any indications of life (leds, screen) when pressing power

Have you tried without the battery connected?

Please read this, and the linked engineering notice:

https://wiki.pine64.org/index.php/Pinebo...ass_Cables

Then see if there any signs of life with using only the barrel adapter with the battery completely disconnected.

@zaius:
Please see point 2. on my list of my original post. I have already tired that!

But I now tried again, so see if the behavior has changed, since I re-flashed the emmc as per point 6. above:


With the battery disconnected, bypass closed upon connecting barrel power the red LED on the backside of the mainboard (above the keyboard next to the on/of symbol) lights up for about 5 seconds along with a high-pitched sound. After 5 seconds the LED goes blank and the high-pitch sound fades.
So pretty similar observation as before...