1. Restart navigation to restore factory settings. The restart button is a built-in small button, which is found on all gps navigators on the back or side of the machine.

2. Press the restart button to see if there is any response on the screen. If there is a reaction, set the calibration screen, and you will be fine after calibration.

3. If the screen still doesn't respond after restarting, you can charge the battery, you can remove the battery holder to charge it, and the battery that can't be removed can be charged with wires. If it doesn't work, it can only be repaired.