My x40 side does not rotate

Show my side brush extends out, but it does not wrought at all. I bought a new side arm and I installed it and it’s still extends out but does not rotate on my X 40 ultra.

Hi,

Please try the following troubleshooting:

"1. **Check the side brush**:
- Carefully check the side brush of the robot vacuum cleaner to see if there is hair or other foreign objects stuck.

2. **Remove the side brush**:
- If foreign objects are found, follow the steps below to remove the side brush:
- Find the fixing device of the side brush, which is usually a pressing or rotating mechanism.
- Carefully remove the side brush.

3. **Clean the side brush**:
- Use scissors or manually to remove the stuck hair and other debris from the side brush.
- Make sure the rotating part of the side brush is unobstructed and maintains its flexibility.

4. **Reinstall the side brush**:
- After cleaning, reinstall the side brush in place following the same removal steps to ensure that it is firmly fixed.

5. **Restart the robot**:
- Turn off the robot vacuum cleaner, then turn it on and try to restart the device.

6. **Restart a task**:
- Select a cleaning task, let the robot start working again, and observe whether it works normally.

If the issue remains unresolved after completing the above steps, please contact support.na@dreame.tech for further investigation and assistance.

Also, kindly provide a video of the problem to help with diagnosis.