You need the specific ROM that matches your model ( TB-8505X ). Several versions exist, often starting with older, stable builds and moving to newer ones.

Fixes tablets stuck on the Lenovo logo screen.

[DT2team]_TB-8505X_S100055_200323_BMP.zip. 264. 1.7GB. Oct 12, 2023 | 02:07PM. 1.9GB. Oct 12, 3. 1.8GB. Oct 12, 2023 | 02:18PM. Android File Host Lenovo Tab M8 TB-8505X Stock Firmware ROM (Flash File)

Click the button next to the Scatter-loading File field.

Download the latest version of verified for Windows. This tool reads the scatter file from your firmware folder and maps the data directly onto the tablet's flash memory blocks. Step-by-Step Firmware Installation Guide

Power off your Lenovo Tab M8 completely. Press and hold the Volume Down button, then immediately connect the tablet to the PC using the USB cable.

Press and hold the button for roughly 10 seconds to force the device to turn on.