Radek

Attention! Your pin file appears to be corrupted. #define NO_CONTROLLER_CUSTOM_WIRING_WARNING is the wrong definition. It should be right #ifndef NO_CONTROLLER_CUSTOM_WIRING_WARNING

Use this pin file [pins_BTT_SKR_MINI_E3_common.zip](https://github.com/bigtreetech/BIGTREETECH-SKR-mini-E3/files/9895360/pins_BTT_SKR_MINI_E3_common.zip) Also check the cable connection there was a wiring error in the original pin file. 

@stilkata8888 What version of the display and SKR do you have? What version of Marli do you have?

BTT MINI12864 V1.0?

Send me your Marlin configuration files that you used to compile. configuration.h configuration_adv.h pins_BTT_SKR_MINI_E3_V2_0.h pins_BTT_SKR_MINI_E3_common.h

In Maril you don't have a defined serial port for TFT changes //#define SERIAL_PORT_2 -1 //EG - on #define SERIAL_PORT_2 0

It looks like a short circuit on the board or a damaged pin on the processor. If you only use one temperature sensor, you can remap the temperature sensor to...

@ivankrushin Do you have the correct temperature sensing sensor defined in the configuration?

Look in the diagram for the switching element used. The source is also quite important. The 24 V power supply will have 2 times more power for 12V.

Your fix is working Thank you