X92 Firmware — Android 9 ((link))

Do not plug the power adapter into the X92 yet. Plug one end of the USB Male-to-Male cable into a USB port on your PC (preferably a USB 2.0 port on the back of the motherboard).

This means the firmware image you downloaded is incompatible with the secure bootloader on your specific X92 hardware revision. You must source a different firmware file. x92 firmware android 9

She connected the X92 to her TV. The boot logo flickered—not the usual ugly green Android, but a stark white letter on a black screen: . Do not plug the power adapter into the X92 yet