For cameras without a visible external button, there are often two soldering pads or "pins" on the internal circuit board that can trigger a hard reset.
Here’s the good news:
If ConfigTool can’t find the camera (e.g., the network stack is corrupted), use the method. This is a true "brick" recovery. how to reset dahua ip camera without reset button better
If you are locked out, you can use the on your PC to initiate a reset without a physical button. For cameras without a visible external button, there