At the risk that I’m in the wrong area here, a small concern to you:
Currently I am making my first experiences with the Pi’s. Even if they are going very slowly …
I bought a Banana Pi R2 with a power adapter and a 4 GB SD card.
Board I have supplied with voltage - no change. Not even an LED, which shows me that voltage is applied.
To test the whole thing first, and based on the inexperience in the area, I wanted to turn on the device first. After seeing that it is necessary to press a button (PWR, next to the RST), I did that. There are 3 LEDs lit up. Blue, green and red.
However, only until I let go of the PWR button.
Yes.
Right now I have a USB cable from my notebook plugged into the board and the power supply is still connected.
Now the 3 LEDs are lit at the same time. I pressed the power button again for at least 10 seconds, but nothing happened.
I have already re-connected the adapter and the USB cable.
Which image have you burned to sdcard? Have you unpacked it and written direct to card (not partition)? Have you are a usb2serial-cable for debug-uart?
Understood. And that is the reason why i need an power adapter 12V and an USB cable?
And why does it not boot with the message “no bootable device” or whatever?
There is just nothing
When i only plug in the normal power adapter, the LEDs are only on when i press the power button.
When i additional plug in an USB cable from my notebook to the board (between the HDMI and Power entrance) the LEDs are on without pressing the power button.