Einleitung
Toothbrush had become very noisy (my daughter refused to use it saying it made her head hurt). Repair was easy - just tighten a loose screw inside.
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As other sonicare repair guides show, the base plug is only held in by friction. If you squeeze the sides it will open a gap you can slip a screwdriver in and lever out the base. A bit of cardboard protects the sides from cosmetic damage.
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There are 2 tabs that prevent the insides sliding out. Release these with a small screwdriver while pushing the metal shaft at the other end, and when both tabs are free the innards will slide out.
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The screw circled was loose. Tightening this fixed the unpleasant noise. I had to use threadlocker to stop it coming loose again.
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To reassemble your device, follow these instructions in reverse order.
