I have an Asus Zenfone AR which has had the screen replaced 3 times. Last time I replaced it myself, Asus the first 2 times.
Screen replacement went fine but once together I discovered up volume button didn't work. Upon further investigation, I have found that playing with the 7-conductor flexible PCB cable, I can get the up button to work but not the down button, and sometimes, if I'm luck, maybe both but then not the power button.
I'm quite confident that the problem resides with the flat cable connection to the motherboard. During assembly, the little white connector, which folds up and down like a lever to press the flexible PCB cable against contractors, popped off, and I've had trouble getting it to stay on. I wonder if maybe the locking connector, what I'm calling this:
Is maybe fatigued? Also, due to its very small size (~5 mm wide) it's hard to even understand what orientation it goes in.
I'm hoping somebody can help me ID/source the white connector. It's my hope that a new connector that didn't pop off will put enough pressure so the cable stays in good contact. Here are some more photos:
And here I took the liberty of drawing up the connectors because they're so hard to photograph: