High pitched whirring

My dream bot continues to make a very high pitch whirring  sound, and I have changed the filter and replaced all brushes and the wheel. I have emptied the dustbin. Help

Hi,
Please follow the steps below to troubleshoot the issue:
1.Please remove the roller brush and its cover, then observe whether the noise disappears.
2.If the noise persists after the step, the device requires repair.
3.If the issue remains unresolved and you are a user in North America, you can contact support.na@dreame.tech for support.
Also, kindly provide a video of the problem to help with diagnosis.