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I used this guide to open a Sonicare 4100 without breaking anything. The main difficulty was dealing with all the electrical connections using fine wires. I rerouted one of them into a notch in the plastic motor housing, and got the motor to run again. I lost the "too much brushing pressure" warning, but I think that's a small price to pay. The 4100 doesn't have that holding screw at the top. It seems overall a little too delicate to last very long without having to open it for another round of maintenance. It's not as expensive as the high-end models (under $50), but that isn't a good enough excuse for being unreliable. A lot of the negative reviews I've seen mention early failure. It's possible the wire I rerouted was misrouted in the first place, and by routing it through that notch in the plastic, I put it where it belonged, and will reduce the need to open it again. Overall, it was easier than I thought it would be.

Thank you! Saved me hundreds of dollars! You’re the best! Liked and subscribed!

Thanks a lot for this video (and other as well). After watching it I was able to repair Philips Diamondcare toothbrush. In the end I simply changed the motherboard but it was a complex task for an absolute beginner in electronics, soldering and all kind of things like that. I wouldn't be able to do it without comprehensive video tutorials!

This fixed my problem. I had the same issues. Battery was fully charged lights up, but as soon as I push the power button, it just light it up and no vibration. I removed that little PP fuse and solder the two points together using a drop of solder and it worked, thank you so much for posting this saved me some money

Amazing bro! I found by pushing the fuse in even with my thumbnail it worked, I then just firmly pressed it again with a screw driver... For those who are looking for the fuse without watchin this its got a little PP on it, just push that badboy down small black rectangle looking thing

do you have a part number for the 2 leather knob surround ?

Hello, my toothbrush won't start, but the battery is reading 4v. I have tested the fuses and the power resistor and all are fine. However close to the switch, there is a small brown capacitor that is shorting to ground on both ends. Would you by any chance know the ohms / voltage of the capacitors that are used as I feel it's this one issue that is stopping the entire thing turning on. I don't really wish to remove one to measure it, as they are quite small and I'll probably lose it. Thanks.

Overall, which Oral-B IO version do you recommend, the 6 or the 9? Thank you!

MY toothbrush just ran out of battery, now it won't take a charge at all. Cleaned it, nothing helped. My wife's is charging, so charger is ok, any advice?

Why the f**k did you make this video

добрый день у меня почему то рядом с этим резистром греется чёрный процессор, очень сильно греется, пришлось отсоеденить от батареи даже так как запах горелого появляется и когда подключаю щётку к батарее она сразу начинает работать на малых оборотах даже кнопка on/off не отключает её. Мне наверное тоже нужна замена этого маленького чёрного процессоря, где мне его взять ? и как он называется? А именно этот резистор что вы выпаивали у меня по моему в порядке.

Thanks for the video. Managed to fix my toothbrush with a piece of wire.

Very nice video After I changed the battery on my io9, the unit didn't turn on and I was worried that I had made a big mistake After some troubleshooting I found out that the "teeth" of the battery compartment were recessed and were not making contact with the battery anymore. I just got a pair of tweezers and pointed them back to the battery compartment and then everything started working again What a relief 😅

I 've been using this tooth brush for 5 years now. It still works but the rubber parts has started to disintegrate (which is disappointing as I've always kept it clean) and there is an air bubble underneath. Your video inspired me so I opened it up thinking it had to be the internal air pressure that was causing the bubble, but no. I think it's just the rubber expanding and forming a dome. There is some evidence of tooth paste ingress but it's so little that I doubt it caused any issues. I wish I could buy a replacement casing.

Can you make a vid of how to open the round black charger stand Oral-B io…the plug cable near the back is kinked thanks 🙏🏽✌🏾

This was perfect!! thank you!

this guy talking is just painful

Thx from czech republic! It´s working. You save my money.

Hello, I have a Philips Sonicare Prestige 9900 toothbrush. I thought it was the battery. I changed it, but the problem persists. So I don't know what to do. Maybe you can help me solve this problem.

This literally happened last night out of nowhere and over 5 years use. I was devastated just to push the damn pp fuse at 3am to fix the issue. Sir thanks a lot to you and your lovely community!

I put the trimmer springs back in place but they pop out over and over again. Is it a good idea to fix them with a drop of glue?

Just contacted Braun authorized repair shop. Was told then only thing that can be replaced is the whole control unit. I asked if they can replace the battery only, they said it can't be done because everything is press-sealed in and so nothing can be removed from the control unit. I'll show the old fart this video, god damn it...

🇧🇷 a minha é esse modelo, só que o anel superior é fixo, não sai como a do vídeo, é só forçar a ponta para dentro com força que ela sai por baixo, fiz uma ponte com uma pinça e ela vibrou novamente, fiz uma pressão sobre o fusível e ela voltou a funcionar, sem a necessidade de troca ou gambiarra de ligação direta

excellent thanks

Здравствуйте! Моя зубная щётка Philips sonicare перестала работать, она все время моргает зелёным светодиодом. Когда ее ставишь на зарядку не происходит звук зарядки, но зарядка потихоньку идет 0.07A. При коротком нажатии кнопки не включается. Когда долго нажимаешь кнопку три раза коротко вибрирует шток и три звука разной тональности. Если нажимаешь кнопку долго еще раз то тоже 3 вибрации штока и 3 звука только в обратной тональности. При этом я ощущаю как шток хорошо вибрирует. Щетку еще не разбирал. Подскажите пожалуйста на что обратить внимание при ремонте? Может быть вы сталкивались с такой проблемой. Спасибо большое.

I have two: IO7 and IO9. When the battery issues started, I got the replacements. I put them inside, and both toothbrushes worked fine, and the seal membranes were not damaged. But just after 2-3 days, one died, and the other could not pass the Hello launcher. I opened both of them - a lot of the liquid inside. Two questions: 1. Could it be that the liquid caused some short circuit, which is not repairable (unless you replace the motherboard)? 2. What I understood is that although you can open this kind of toothbrush for battery replacement, in most cases, you cannot put them back with the waterproofing you had initially. So it just doesn't make an immense sense. Thank you in advance for your reply!

I literally can't believe it, but applying pressure worked for me too. I'll definitely come back if it winds up failing, since this brush is now literally double the price I paid only 3 years ago.

Thanks for this comprehensive video! My Pro 1000 (1 month out of warranty!) was “stuck” just as you described, and a judicious application of a hammer got it going again. You have to wonder what causes this to happen so often. Looks like it really needs better brushes!

Jumping on the "You just saved me $200!" bandwagon. Also I brushed my teeth immediately after fixing my toothbrush and I'm both amazed and completely horrified at how incredibly clean my teeth feel. I didn't even realize the performance of my toothbrush had slipped so far before it became completely unusable. 🫣 Thank you sooo much!

Thanks to your video, I was able to replace the trimmer! Much appreciated!

PP nicht entfernen, nur etwas anheizen und das war es schon. Oder mit einem Cuttermesser unten etwas hoch hebeln könnte auch helfen.

Thank you!!!

I wish I could give this a million likes! Thanks for the help! Just swapped my motor out.

Many thanks.

Hello, my toothbrush turns itself on without anyone touching it. Do you know what causes that ? Thanks.

Deu bom, obrigado!

The video was excellent. My device was blocking every 10 seconds with the blade symbol appearing, but changing the blade didn’t help. I managed to fix it by removing the battery and forcing a reset of the device. Thank you very much for the video. I’m impressed by how no one talks about the problems with this device: the Braun Pro S9. This is the second one I’ve bought with the same issue. The company should better inform its customers. It made me throw the first one away and buy another. Impressed with your video, but it’s a shame for the company

Pure gold. I love the way you explained the workings. I have one and it stopped working suddenly. I found a break in that rubber seal on top and water had seeped in. Undoubtedly, this was the cause. I cleaned it up, any toothpaste residue, dried it, recharged it, but still nothing. So I will go through your video to repair it. It might also be the battery that needs replacing, who knows. Also there is a gap next to the magnetic rotor that has to be not too close or too far to work right. You sound Russian. The best fixes are by Russians. Love them! Russia is also a magnificent place to visit, some of the world's greatest art treasures, sweeping landscapes, a fantastic rail system, great food, great handicrafts. They are the best artisans, engineers, athletes, artists, dancers, composers. What an amazing country.

I have the same Kärcher but my problem is no pressure flows valves and head is good, I think I will check the part where you replace the O ring might be that problem but at least because of that video I learned couple of things which I never expected thanks for making that video 👍🏼

My friend, you have given me a victory over this Genius x! This isnmy second one that died. I finally decided to follow your steps and i was successful! These other viewers are right. the fuse must come loose over time because when i applied down force to the fuse, it kicked on! It must pop up as a common issue with this toothbursh. I thank you for your guidance and for this video! God bless!!

How is it that the same motor has more torque on this model and less on vitality model?😊

Thank you for this great video! My toothbrush now works but I lost the top ring. Do you know where I can get a replacement ring ? The toothbrush works but I am not using it as I am afraid the water will get in the electronics

Best S9 teardown video on RUclips! It answered all of my questions. Thanks for doing this! It should be obvious, but if you need a new battery there's plenty on eBay and Amazon. The OEM specs are: 1300mAh P/N 81377206 UR18500Y

I think I really messed up my fuse. I pushed down on it and It worked for 1 second and lost all power and lights. Can I send you my toothbrush in for repair?

How do you detached the board ?

In case the battery is fully charged (measured by multimeter) but toothbrush doesn't turn on and vibrates 3 times to signal that battery should be charged. What you can do is cleaning battery connectors with contact spray. Then if still not working you can also reset the toothbrush by pluging the charger and put toothbrush on it then press power button for 2s with thé following sequence going : 1 beep 2 beeps 3 beeps then release and you should hear a melody. For me it fixed my issue after cleaning + resetting my sonycare. PS : huge thanks to the owner of this channel for the content quality.

Easier way to open is to put a drill bit in the charging port hole and lever forwards and backwards

Thanks for this useful video. Unfortunately I think a nearby lightning strike has caused a pulse in the charging coil strong enough to fry the charging circuit, because the brush will now blink its charging light once or twice and then ‘crash.’ The charging light stays off or on until I push the button. The brush itself still works. Perhaps I can hack together a way to charge it via USB, but I think I'll just buy a new one and keep this one for spares… and put the new one in a metal box when there's another storm.

where can i order a replacement button?

did you confirm the I7 and S9 base are the same other than the bottom plate?