If you are experiencing issues with powering on your V40, there are a few things you can do to troubleshoot the problem.

Firstly, check if the charger is working properly. If the indicator light is not on, it may be time to replace the charger.

If the battery can be charged normally and an error is reported after turning on the power, it is likely a display malfunction and the display needs to be replaced.

In some cases, if the battery is not working for a long time in the feeding state, the battery will automatically lock. At this time, it needs to be fully charged and checked to see if it can be turned on normally.

If the power still cannot be turned on, it may be time to replace the battery.

If the problem remains unresolved, the controller may need to be replaced.

If you have tried all of these steps and are still experiencing issues with powering on your V40, please contact our customer support team for further assistance. We are always happy to help you troubleshoot any issues you may be experiencing with your device.