Continuing on with the sensor as the topic of discussion. If at initially "millions of collected dust particles" were attractively exhibited on the monitor, then the display may have simply stopped turning on when the control button located below it was pressed. If you look at the reflection very carefully, you can see that the menu is performing some kind of cyclic reloading, but the actual image is not being shown on the display. It would appear that the dust sensor is being polled in order to display columns with the number of "collected dust particles," and because there are problems with it, the vacuum cleaner enters a state known as "reboot." You can even have time to enter the settings and see that the dust detection sensor is in the "off" state, and when you try to turn it on, it is displayed that it is "on," but it the state is immediately reset to the "off" state. However, if you press the button to activate the vacuum cleaner, then the vacuum cleaner turns on and "wow!" the display starts to show the operating mode (Eco / Medium / High). It was attempted to reset the state of the dust sensor by removing the battery for fifteen minutes or allowing it to charge for more than thirty minutes; however, this did not produce any results. Dyson recommends doing either of these things. On Reddit, there are a lot of messages about this model's flaw, which manifests itself either within the first few minutes of use or, for instance, after a week of use. In general, this model has two drawbacks: one is a problem with the dust particle sensor, and the other is a well-known snag with a "filter needs cleaning" message that comes right out of the box. Both of these issues are problematic. It is only effective to replace the entire main body, which is the primary component of the vacuum cleaner and which Dyson provides free of charge within the warranty period:((In addition, the third replacement was the only one that regularly functioned for some people. I simply cannot fathom how someone could have messed up with this model in any way. If you watch a video of an entire disassembly, you will see that the main unit is comprised of a few plastics, a couple of gaskets, an engine with a control board and a display, and another 4x4 cm board with an unpleasant piezo sensor for counting dust. All of these components fit together to form the main unit. And now "it" has succeeded in escaping the packaging or occurring during the initial cleaning:)))