A method for detecting errors or malfunctions in electrical or electronic components of circuits, wherein each of the circuits is located on a circuit board and wherein a plurality of circuit boards border one another on a circuit board panel, includes populating each of the circuit boards of the circuit board panel with electrical or electronic components corresponding to the circuits; for each of the analog, electrical or electronic components used for the construction of the circuits, placing a corresponding test component in an edge region of the circuit board panel; providing the analog, electrical or electronic test components placed in the edge region of the circuit board panel with test points; and checking for the correct function value and/or the correct poling of the analog, electrical or electronic test components provided with test points and located in the edge region of the circuit board panel.