I have built my own delta design running the duet. I have also designed and built a paste extruder

any ideas?

ok unplugged everything. t1 reads 0' t2 reads 100' still

have a solidoodle I upgraded with duet wifi and e3d chimera. been working fine for alomst a year. all of a sudden the last print the board reset in the middle. cant connect via wifi. But I hooked up with repetier. t1 and the bed heats and cools like normal with normal readings. T2 is reading a constant 100'c no matter what. Ive swapped thermistors wires didnt make a difference but says both thermistors work still. Checked the VSSA fuse and it reads 3 ohms. Even with the thermistors unplugged the board reads 100'c I dont know what to check next