Hey I found the solution!
I didn't thought off looking at the leds before you talked about them. So I realized the hotend was actually heating when I give the command M104 but shut's down after a very short time because the themistor wasn't reading any temp. changing. I was thinking it was heating with the bed because it was a bit hot and the thermistor was reading a temperature increase. In my old firmware I had the extruded thermistor in T1 and in the new fw it is in T0. Until now i don't know why T0 was reading a temperature increase when the bed was heating. So know I changed pin.h to invert T1 and T0 and now everything works fine.
Sorry for my bad observation but you gave me the key to find the problem! Thank you!
I didn't thought off looking at the leds before you talked about them. So I realized the hotend was actually heating when I give the command M104 but shut's down after a very short time because the themistor wasn't reading any temp. changing. I was thinking it was heating with the bed because it was a bit hot and the thermistor was reading a temperature increase. In my old firmware I had the extruded thermistor in T1 and in the new fw it is in T0. Until now i don't know why T0 was reading a temperature increase when the bed was heating. So know I changed pin.h to invert T1 and T0 and now everything works fine.
Sorry for my bad observation but you gave me the key to find the problem! Thank you!