Krups EA80/81 All LED`S are on

Hello

I am reporting due to an unsuccessful repair of my EA80. It started all of a sudden with all 4 LED's lighting up at the same time after I turned it on. After I removed the lid on top, I saw that it displays error message 9, which according to the Internet indicates heating block. Then I did this reset or function test, everything works. (Machine unplug, Trester container and water container out, cup quantity on 20ml, button large coffee hold, switch on, the container back in, turn the dial until the LED's are off, button small coffee) and off we go, everything works great so far. After that, however, it goes back to the said malfunction.

I then disassembled it and saw that the cables on the NTC sensor no longer sit properly. I soldered them on again, reassembled everything, error still there.
Can anyone help me? Heats the machine aufjedenfall, because the thermoblock was properly warm.

Greetings
Michael