Brush starts but won't shut off until relplaced in charger(switch?)

Oral B sonic starts and charges but won't shut off until replaced in charger

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davidpeltier, Oral B sonic starts and charges but won't shut off, the off button may have slipped out of position inside the housing of the brush or the contacts may need cleaned. The disassembly link below may help in getting you inside the brush to check the switch. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.

Braun Oral-B Sonic Complete 4729 Battery Replacement

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Mine show thesma ebehaviour now. I took it apart ( search for batteryreplacement to find the procedure) and noticed a lot of corrosion inside. Probably the little on-off switch is corroed too. It is a switch on the smd circuit board. I will use a solder iron to take off and check if i can clean it or find a replacement switch.

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davidpeltier will be eternally grateful.
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