HX9350 Vibrates One Short Pulse, then Shuts Off

Hi all,

I have a Sonicare DiamonClean HX9350. When I press the power button, I get a very quick short vibration buzz and then the unit shuts off. This can be repeated indefinitely. The unit is over 7 years old so I suspect it may be time for a battery. However, I don’t necessarily want to buy a battery if that isn’t the issue.

The unit flashes as if the battery is full when put on charge, but I know that isn’t an indication of battery capacity.

I already have the unit apart. There was a little moisture inside so I’ll probably want to replace the seal or shaft, but I don’t see any corrosion.

I’m more or less wondering if anyone has seen this symptom…


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