5. How to deal with the DM13 crash and other problem?

If you just got it and can't turn it on, make sure that the D.MODE switch on the rear panel is turned OFF.

Why some devices can't be closed by gently closing the cover?

We have taken into consideration various usage scenarios in our design. Especially in portable use, such as in the bag, the cover should not be opened with a little shaking.That's why the push button is designed with a heavier feel. If the strength is too light when closing the lid, it will not be so easy to close. This is a normal phenomenon, just close the cover with a little force.