Again, that’s incorrect. Pounds (Lbs) are the US measurement for mass. Feel free to provide a source to the contrary. I specified pounds mass vs pounds force because in an engineering space, it’s worthwhile to be specific, but the Pound (lb) is all that is specified in any documentation as the unit for mass in the US system.
If it was a motherboard replacement, it’s entirely possible they missed connecting the cable for the camera entirely or just didn’t get it fully connected and is loose.