Shutter count is a useful data point, not the whole story. A camera with 10,000 clicks that was dropped on concrete is worse than a 150,000-click camera that lived in a dust-free studio.
Method depends on your camera brand.
"I can't fix the shutter without replacing the part," Elias said softly. "And if I replace the part, the firmware defaults." shutter count
"Let’s see," Elias muttered. He connected the camera to his terminal via a tangle of USB cables. He navigated through the service menus, bypassing the user interface to dig into the camera’s firmware—the digital soul of the machine. Shutter count is a useful data point, not the whole story