As you can see from the video above, my dyson vacuum is not working even when I press the trigger.

The blue light is blinking.

There could be two reasons in my case

First, the Vacuum battery issue.

Make sure you correctly charge the battery.

If the Dyson vacuum battery is not charging or not holding charging, there could be a possibility that the battery is not healthy anymore.

You would need to replace the battery in this case.

Second reason could be due the moisture trapped inside the vacuum or wet filter.

Make sure you dry the filter before install it back to the Dyson vacuum.

If vacuum won't start if it sense high level of moisture in its components.

Make sure both the vacuum and filter are dry enough to operate.