Hello! Thank you for your message.Please check carefully:
1. Whether the format of the picture you need to replace is bmp, please right-click on the computer properties to check.
2. Whether you follow the on-screen instructions, i.e., the update progress will be displayed after inserting the USB flash drive, and the prompt will be displayed and restarted automatically after unplugging the USB flash drive.
If you can Please take a picture of the back of your board, we can also determine whether it is because the version is too old need to be updated to support, thank you for your cooperation!If you still have problems, please contact me.
Best Regards,
Chao
WhatsApp: 008613260055123
Email: chao@stone-hmi.com