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  1. Hello, Thank you for your answer. For a reason I don't get, but I had to strap Jumper P10 and P11, and I got something on the serial line. https://wiki.kobol.io/helios64/jumper/ The bootloader appears and linux starts after 2-3 minutes. We can say that it is solved but I don't understand why.
  2. Hello, I received recently an Helios64 from a new friend, However, when I get home, I plug it in, turn it on (already I have to press the power button for 4 seconds to get some life) and I get the following LEDs lit up: - LED1 - LED2 - LED3 - LED5 - LED6 i got nothing on the serial line (tested on MacOS and Windows), and no reaction when I do quick and long press on Recovery nor Reset. Is there some electronic schematic that could help me to debug hardware or procedure to get JTAG access to the RK3399 ? Regards,
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