Abstract: A method for identifying at least a display panel of a notebook computer by processing audio signals is to incorporate a resistor on the main circuit board of the notebook computer, and different resistors in different display panels for deriving specific voltages. A control unit generates a strapping signal to pass through the voltage derivation circuit to an audio CODEC. The audio CODEC reads the voltage and transforms it into digital value and finds out the corresponding panel ID with a matching table. Therefore, the corresponding display panel can be identified.