If your YT9216BJ unit is stuck in a permanent boot loop on the logo screen, you cannot access the touch settings menu to trigger a standard local update. You can force a hardware-level recovery instead:
MediaTek MT8227L / MT6580 Quad-Core ARM architecture. MCU Board Type: XY AUTO YT9216 / YT9217 / YT9218 series.
If your YT9216BJ unit is stuck in a permanent boot loop on the logo screen, you cannot access the touch settings menu to trigger a standard local update. You can force a hardware-level recovery instead:
MediaTek MT8227L / MT6580 Quad-Core ARM architecture. MCU Board Type: XY AUTO YT9216 / YT9217 / YT9218 series. android yt9216bj00012v001 update full