atelier48

Hi, I had to change my nozzle temperature sensor cable yesterday, so had to open the motherboard panel etc. Now, the buildplate does not lower when printing, and when printing only : otherwise it rises, lower etc to put itself into position, but when printing it stays a the level of the first layer, and add material again and again until making balls of plastic... I noticed a cable that was not attached to the motherboard, but I assumed it was there for dual extrusion. Does anyone know what could be wrong ? Thx