Edgar|

I tried the recovery button in order to install OS on NanoPi M4v2 as follow: 1) Flash microSD card with eflash image 2) Insert microSD in board and plug the eMMC module 3) Power on the board 4) Install OS on eMMC 5) Shutdown board and eject microSD 6) Keep pressed recovery button while press power button for 2 seconds 7) Release recovery button 8) eMMC has booted fine to OS Thanks to this forum for the TIP