Asus Tinker Board E15215TinkerBoardSeriesEMWEB - Page 10

4. OS Write Recovery (Tinker Board S only) 4.1 Rewriting the OS using UMS from eMMC You can recover using the UMS from eMMC if your eMMC's U-Boot is still working properly and has a built-in UMS function. Please follow the steps below to re-write the OS using UMS mode: • Ensure the eMMC has a working U-Boot. • Please remove all other connected extension devices from your Tinker Board S. 1. Connect your Tinker Board S to a PC via a micro USB cable, it should boot and create partitions like any other USB drive. 2. Write the downloaded OS image to the Tinker Board S using a third-party ISO software, such as Etcher or Win32DiskImager. You may refer to the Writing the OS image section of this manual for more information on writing the OS image. 4.2 Rewriting the OS using UMS from a microSD card When there is a problem booting from the eMMC's U-Boot, or if you are using a thirdparty custom OS image which does not have a built-in UMS function, you may follow the steps below to trigger the UMS mode from a microSD card: 1. Download a Tinker Board supported operating system image such as the Official ASUS Tinker OS, or an Android OS. 2. Insert a microSD card to a card reader connected to your PC. 3. Write the OS image (with built-in UMS U-Boot) to the microSD card using a third- party ISO software, such as Etcher or Win32DiskImager. You may refer to the Writing the OS image section of this manual for more information on writing the OS image. 4. Remove the microSD card from the card reader and insert it into your Tinker Board S. Please refer to your Tinker Board product manual for the location of the microSD slot. 10