: If the image is mirrored or has incorrect colors after flashing, access the factory settings by pressing "Input" then "2 5 8 0" on your remote.

: The indicator light on the key button board will flash (often alternating red and blue) for about 1 minute . Do not disconnect power during this time.

: Once the light stops flashing or stays a solid color (red), the upgrade is complete. Unplug the USB before restarting. Configuration Tips

: Ensure the firmware matches your screen's resolution ( 1920x1200 ) and LVDS bit-rate (e.g., 6-bit or 8-bit) to avoid image distortion.

: Insert the USB drive and the 7-key button board into the controller. Connect the 12V power.

: Before powering on, verify that the jumper cap for panel voltage (3.3V, 5V, or 12V) is set correctly for your specific LCD panel to prevent hardware damage.

You can find collections of firmware files (including the resolution) on the following technical forums and resources: