https://imgur.com/a/OeGMG9I
That’s the black screen I was talking about.
It happens when it’s when it’s dead and I put it on charge.
At first it will start on this screen:
https://imgur.com/a/h8rUpDu
But after around an hour it goes to the first screen automatically.
I can then hold the power button in for 20 sec then let go and the light will go green and show that second screen again. If I hold and release the power button the same way again it will reboot and the green light will still be on.
Then to turn it off while unplugged I do the sequence to go into USB downloader mode.
Hold power for 20 seconds until green light turns off. Hold home button, release power, release home. The green light will then turn off.