This plug had a cable that  had been pluged out by  force many times, so eventually it had all seven  inner cables making a shortcut with each other and causing the handpiece not to work at all. So with some drops of super glue and a piece of sugru I managed to isolate the inner cables and stabilize the plug. This should probably have saved  the dentist more than 123 euros with VAT.

Take a look at  how simple it is.

Step 1: Check If All Pins Are Working Properly

To do this just use a multimeter in buzzer mode and check the conductivity for each pin.
In my case all worked  just fine...lucky me! 

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