Test setup: Cortex-M4 @ 80 MHz, 256 KB flash, 64 KB RAM. Benchmarks include:

Look at the sticker on the back of your LCD. You need the full model number (e.g., LTN156AT01 ).

: Supports a vast range of screen sizes from 7 to 65 inches .

Updating or changing the firmware on this board is a technical process that usually requires dedicated hardware: Pre-Flashing : Most retailers like or sellers on AliExpress

Ensure the power supply matches the board's requirements (often 12V DC) to avoid stability issues or flickering.

M.NT68676.3 is a universal LCD controller board (also known as a driver or scaler board) based on the Novatek NT68676

This usually means the panel is getting power but no data. Check your LVDS cable orientation.