The following is a complete overview of the wiring for the RAMBo board. You should review all of your wiring connections and ensure that everything is connected in the correct locations.

HE280 power (2 position terminal block with 1 red 18awg & 1 black 18awg wire) goes to Heat 0 terminal ------------- HE280 thermistor (2 position latching connector with 1 white 26awg & 1 green 26awg wire) goes to the T0 position on the RAMBo board

Layer Fan power (2 position terminal block with 1 orange 26awg wire (-)) goes to Fan 0

Heated bed power (2 Position terminal block with 1 black wire) goes to the Heat2-Bed (-) terminal ---------- Heated bed thermistor (2 position latching connector with 2 white wires) goes to the T2 position on the RAMBo board

PS-ON (2 position latching connector with 1 blue 26awg wire) goes to the PS-ON position on the RAMBo board

i2c (4 position latching connector with 1 red & 1 black 26awg wire) goes to the i2c position on the RAMBo board

Stepper motors connect to stepper motor drivers, labelled X Y Z & E0 ---------- Endstops connect to X Y Z max endstop inputs ---------- 40mm fan connects to 12v AUX output ---------- 12v (6 position terminal block with red and black wires) connects to VIN input on the RAMBo Board