At present, like many mobile phones, the front camera does not have a flash, so it is normal that the flash cannot be turned on when using the front camera. Cameras can be divided into digital cameras and analog cameras. The digital camera can convert the analog video signal generated by the video capture device into digital signal, and then store it in the computer.
The front camera cannot be turned on. First, consider whether to turn it off by setting it to enter the photographing mode. In the photographing mode, click the flash logo on the upper left corner, switch to the opening mode, and try to take a picture to see if the flash works. The digital camera can capture the image directly, and then transmit it to the computer through serial, parallel port or USB interface.
There is also a special case. There are many shooting modes. The delay shooting and panorama are adjusted by the system itself. There is no flash manual switch setting, so it cannot be turned on in some cases. The cameras in the computer market are mainly digital cameras, and the digital cameras are mainly USB digital cameras using new data transmission interfaces. Most of these products are visible in the market.
After these are confirmed, they still cannot be opened. Check the top of the back and the position next to the camera to see if there is any mechanical damage or blocked by the phone case. If there are these problems, first remove them. The video signal captured by the analog camera must be converted into digital mode by a specific video capture card and compressed before it can be converted to a computer for use.