Radek

If it doesn't warm up, everything can't be okay. 1. What is the resistance of the heater 2. Switch on the heating and measure the voltage on the heater. 3....

Perform the measurement with the heater connected

You should not measure negative voltage. Do you measure the voltage at the right points? Does the heater on HE0 work properly?

This error is tapic if the control board is powered only via the USB connector, or there is a blown fuse that supplies the 12 / 24V motor drivers. Another...

https://github.com/bigtreetech/SKR-2/issues/128

@hcet14 Your URL links never work. When are you making a mistake? The functional link looks like this: https://github.com/bigtreetech/SKR-2/issues/129

Don't click on the icon. Just copy the page address and paste it on a new line via Ctrl+V

You have to delete the word (url) between the parentheses before you insert the link there ....

Write the word you want to appear in square brackets and put the link itself in round brackets instead of the word URL [my link](https://github.com/bigtreetech/BIGTREETECH-TouchScreenFirmware/issues)

You have to set the jumper for the UART mod I think he's here