1. For the first time, remove the battery release paper
2. Check whether the battery has been charged for half an hour and then replace the adapter to charge it
3. Replace the battery
4. The startup operation is to press the on/off button until "android" appears on the screen and then release it.
5. Check whether the power button is depressed or damaged
6. Check whether the startup has a backlight. It has a backlight, the LCD is not plugged in properly or is faulty. It needs to be replaced
7. Contact after-sales engineers to reload the kernel or perform other operations