When playing Duowei L3 video, the camera shows a red dot and then the screen goes black. What’s going on?

It tends to be caused by conflicts during the running of system software files.

It may also be caused by unstable motherboard operating voltage;

Troubleshoot according to the following methods:

1. Force restart

2. If it still doesn’t work, clean up the system junk and slim down the phone.

2. If the problem persists, check for viruses and restore the phone to factory settings.

3. If the problem persists, re-flash the phone - re-download the system package and connect to the computer to flash the phone.

4. If the problem persists, it is a motherboard problem. It is recommended to send it to after-sales service