I guess you have a headphone, no?
Do you have a resistor with a value around 2KOhm?
Could you please post a photo of the board?
The way to proceed is to put power on, without any input signal, and measure the voltage on all LM1036 pins from ground.
Thus, please connect the black wire of your multimeter to pin 10 and measure in turn with the red wire the voltages on all other pins: