Press and hold the "Reset" button (usually hidden inside the AV port).
Open the box and look for the version number printed on the green circuit board (e.g., V1.1, V2.0). amlogic s905l2 firmware link
The S905L2 is sensitive to Device Tree Blob (DTB) mismatches. If the screen stays black after flashing, the DTB is likely wrong. Press and hold the "Reset" button (usually hidden
If your box is currently working, try to back up the original partition using Amlogic tools. click "File" -> "Import Image
Open the tool, click "File" -> "Import Image," and select your .img file. Prepare the Box: Unplug the power from your TV box. The Connection:
Check the "Android TV Stick and Box" forums.
