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Repair guides and support for battery-powered toothbrushes.

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Oral B 3767 Toothbrush turns on and off after a few seconds

Oral B 3767 Toothbrush turns on and off after a few seconds. When it turns off it flashes both red and green 4 times.

It now also turns on automatically when I take it out of the base.

See video here (note base is somewhat opened because I was checking for water damage)

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Hi @wildoscar

Open the toothbrush and check what the battery voltage is i.e ~3.6V. It may be that the battery is failing to hold sufficient charge and needs to be replaced.

Here's a link that may help.

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