Put control panel in engineering mode if possible.
If not use user code to cancell noise.
Open control panel lid,remove the 4 screws holding pcb cover.
Speaker top left corner with molex connection.
Unplug lead,remove piezo from holder and replace with new piezo.
Now replace lid and screw,close control and come out of engineering or reset with code.
May be easier to remove power connection at start.
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