During the bios update process, I accidentally switched off the AC power. Now my board cannot boot up with only a green light on. Is there a bios recovery method like this (laptop with Insyde bios) ? Thanks in advance!
No, please see this thread https://www.udoo.org/forum/threads/reset-bios-jumper-or-pins.6674/ If you cannot boot from at least some sort of device configured with the flashing tools and the latest bios update, you are going to have to RMA the board.