Introduction
The remote on/off button is not sensitive after few years of use, I swapped it with the decrease power button (still sensitive as seldom used). You can replace with a new micro button if available.
What you need
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This is the Electrolux ZUA3840
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Just open using a screw driver the same way when you replace the battery
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Turn over the button panel, take the circuit board out and the on/off button is the right of the image, you can feel it is not sensitive.
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Because I don't have a new micro switch so I plan to swap it with the reduce power one.
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Solder back the micro switches, insert the battery and test it BEFORE you put it back to the button panel.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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