caspar_sun

$ sudo dd if=/dev/mmcblk1 of=/home/linaro/Desktop/mmcblk1.img bs=X count=Y conv=noerror,sync [NOTE]: X means Block size; Y means Processing number of blocks. X*Y has to a little bit bigger than the resized capacity. The dd procedure needs to reserve some space to process. If the reserve space is not enough, the dd procedure would be failed. For example: For this case, the bs would be 5M and count would be 1000 and the created image size would be 5GB totally. Then the created image could be restored back to the whole storage of the next board by dd/ecther/Win32DiskImager. PS: u can follow way to rezise storage partition before u backup the image https://github.com/TinkerBoard/TinkerBoard/wiki/Developer-Guide#for-tinker-board-2s

u can try this command to find u cam is /dev/video* : $ v4l2-ctl --list-devices

from here: https://tinker-board.asus.com/doc_tb2.html#qvl/

Requirement: • 1 x USB Type-C cable with data transfer function • 1 x 12v ~19v , DC 5.5/2.5 Power supply • 1 x Monitor with HDMI cable • 1 x USB Keyboard and Mouse set Setting Up (step-by-setp): 1. Connect the Tinker Board 2S to a PC using a USB Type-C cable. 2. Connect the power adapter to the Tinker Board 2S. 3. Download the TinkerOS image from the Tinker Board website (https://tinker-board.asus.com/download. html) and burn it into the Tinker Board using a third-party ISO software, such as balenaEtcher. 4. After the TinkerOS image is successfully burned, disconnect all cables （USB & Power）from the Tinker Board 2S. 5. Connect usb keyboard, mouse, and monitor to your Tinker Board 2S，after reconnect the power supply, and to auto boot up.

This form is from the User Manual. So, a power supply of at least 30W is recommended ex: 30W=12V x 2.5A

u can try using etcher to refresh the image. https://www.balena.io/etcher/