Hello all , I'm new in the forum but not new in the 3d printing ambient , I have this printer Flashforge Dreamer , I bouight it used with many problems after a lightning messed up the previous owner electric cables in his house , long story short , I repaired the whole machine , the onli one thing "original" is the plastic white shell of the dreamer , but one problem still remain , the bed do not heat up , as I said I changed anything with new original parts bought from the flashforge site , motors , heat bed , motherboard , power supply unit , extruders , changed really anything even the wires inside , but still got this error ? how the hell I can get rid of it?