LG Leon Selfie Camera doesn't work or appear in Camera app

[jcjewell]

I've got a LG Leon LTE that works perfectly, except the selfie camera doesn't work, and is inaccessible from the standard camera app. There is no "swap camera" icon when I use the app. The rear camera works fine. I figured the camera itself had gone bad or somehow disconnected itself from the board, and since I also own an LG Tribute 2 with working front and rear cameras, so I opened both phones and swapped cameras. The camera from the Leon worked fine in the Tribute 2, but the camera from the Tribute 2 is still inaccessible in the Leon. Still no "swap camera" icon in the camera app. Both phones are at Android Lollipop 5.1.1, Kernel version 3.10.49, Build LMY47V. Both phones are rooted. Can anyone please give me a clue as to why the standard camera app can't see the front (selfie) camera and what I can do about it? I've tried hard and soft resets and recoveries to no avail. Thanks in advance.

 

[Rukbat]

Sounds like a problem on the Leon's motherboard.