Dreame D9 Side Brush Motor not working

Glad to hear! Yes yes so far still working perfectly after the fix

Well, I connected myself the motor to cables plugged in a USB port, and motor works. So it's not the cause.

Hi there, did you contact Dreame via email or Amazon?

I found out. The motherboard power pins lose contact with the side motor pins.
Looks like Dreame has a defect, because there's nothing that guarantees this contact.
Surely this will happen to other people, after some time of robot working with vibrations, oscillations...
I posted pics here https://imgur.com/gallery/GfnbKo7

Antek82 : your post could be saving a lot of troubles and shipping costs for quite few buyers - only hope for dreame that it was a single batch issue..
It's been a week, is your fix still holding well ?

If I understand right, this picture shows your fix: https://i.imgur.com/VE9OTTq.jpg

Looks like you cut up/tore off legs from a battery holder and placed them there to ensure permanent contact between motherboard and motor pins ?
Correct ?

Here's my story on reddit - will crosspost this thread there.
https://old.reddit.com/r/Xiaomi/comments/lyc31l/dreame_d9_side_brush_not_working/

Exact same issue as you experience - also in contact with the seller (dreame Direct Store, shipping Spain toNL) and dreame themselves (aftersales@dreame.tech)
so far, not much happening, seller wants me to ship back to Spain, dreame asked the first batch of information (s/n, problem description etc)

Hello !
Yes I confirm that's the solution. I had to make it better and more stabil, but it's definitely working, sure an electrician can do better job, but there's no doubt that this was the problem. Simply one contact can get lost during the working ( robot is powerful, pushing, jumping...so it will happen), and it simply stop and tell to clean this damned side brush.
Poor projecting really. Poor.
I was also writing to dreame aftersales, but I realized that they are just pasting predefined answers, nobody will look into your problem, and that's a shame about them. So good to find people like you and shares solution ! Good luck

Hi Antek82, thank you guys both actually for sharing the solution. It didn't happen with my device so I didn't know how to fix it. And tbh I thought Dreame support might help with this too.

Sorry to hear you had issues with your devices tho.

Yes I'm happy I managed, but can happen with your too, one day or another, I guess depends how much solicitation and stress has the robot during the work. Mine was perfect 45 days ( it was used almost everyday). Good Luck !