Screen freezes and blurred screens are usually not caused by damage to the camera itself. It is recommended to troubleshoot in the following order:

1. View code rate settings: The higher the resolution, the greater the bit rate. If the switch or router has insufficient bandwidth, please reduce the bit rate or resolution appropriately.
2. Check the switch: Multiple high-definition points should use Gigabit switches. 100M switches connected to more than 4 channels of 2 million pixel cameras are prone to congestion.
3. Check network cable: Poor quality or too long network cables will cause packet loss. It is recommended that a single segment of network cable should not exceed 90 meters, and oxygen-free copper network cables should be used.
4. Check power supply: The PoE power supply distance is too far or the power is insufficient, which will cause the device to restart. Please confirm that the total power of the switch meets the needs of all points.

If the above are normal, you can try to upgrade the firmware of the recorder and camera, or change the port to test.