Z30 - why does proximity and light sensor failed after housing swap

Ok so I ordered and installed a brand new Z30 housing and battery from Shop Crackberry. Now its working fine except the proximity and ligh sensor. I was very careful and everything and I dont think I damaged any component.

Now the thing is it's my dad's phone and he don't know if it was working berfore I proceeded.

Notice that I had to keep both front and rear camera from the old housing.

What could've gone wrong? I redid the swap and try the old housing as it was before and it's not workin either...

You guys think it is a coincidence?

Any help is welcome!

As you said... they might have been bad all along.

At this point, if you have tried swapping them around - played with the connections.

1) You reload the OS to rule out there being some OS conflict.

2) You replace the faulty or damaged components.