Radek

You have a mistake here. #define E0_AUTO_FAN_PIN P2_03 #define E1_AUTO_FAN_PIN -1 #define E2_AUTO_FAN_PIN -1 #define E3_AUTO_FAN_PIN -1 #define E4_AUTO_FAN_PIN -1 #define E5_AUTO_FAN_PIN -1 #define CHAMBER_AUTO_FAN_PIN -1

After replacing the CPU, you must load the bootloader https://github.com/ardiehl/BTT_SKR_13_14_14T_SD-DFU-Bootloader https://github.com/bigtreetech/BIGTREETECH-SKR-V1.3/issues/346 https://community.platformio.org/t/skr-1-4-bricked/12932/4

None of the serial port settings affect the emulated mode function. In marlin mode, you will see the SD card slot that you install in marlin. It's a choice: #define...

In Merlin you have to enable serial port 0 and set the same serial port baud rate on both TFT and SKR.

If you have it set up correctly, read this https://github.com/bigtreetech/BIGTREETECH-TouchScreenFirmware/issues/2382

Does Merlin mode work for you? Users with the same problem have written here several times. There may be a port configuration or speed error. (you wrote that you checked)...

Reset the settings with an empty reset.txt file Please close the unnecessary ticket Thank you

duplication https://github.com/bigtreetech/BIGTREETECH-SKR-V1.3/issues/552

Post your ideas here :-) https://github.com/bigtreetech/BIGTREETECH-TouchScreenFirmware/issues

@xvortex Hello Can you please reissue the Botloader? The previous link no longer works.