A quick demo of replacing filter will solve the blockage light flashing & dyson on-and-off finally power cut issue, though no sigh of filter light at all. The investigation procedure could be applied to a TRUE deep cleaning of the cyclone part as well, simple dissemble is required and straightforward.

Official Dyson troubleshooting video:    • How to check your Dyson Cyclone V10™ ...  

Official blockage light troubleshooting: https://support.dyson.co.nz/support/d...