While my issue is not identical to yours, I too replaced a 5s front panel assembly and am experiencing issues with the proximity sensor. My screen actually works but my front camera and proximity sensor seem to be shot. I have tried replacing with another, and I even took it to a cellphone repair shop with no success yet. I transferred the copper tape over and that didn't change. The shop told me it's supposedly attributed to the way/order you removed the front panel from phone. If you don't remove it a certain way it'll actually cause software glitches. But then again, it sounded like they just wanted to sell me a whole new assembly, who knows. That, and they told me it was a notorious issue with 4/4s. Anybody else shine some light on this problem?
I do not believe so. The only information I had read online was to apply alcohol on the board? That's pretty much all I did, and I let it dry for about a day in rice. By water treated, should I have performed a different procedure, or to what do you refer? Thanks for all the help so far.
Yes I'm hoping that'll fix it, otherwise motherboard repair is quite difficult I'm assuming. Would motherboard damage be something related to actual water damage or just bad installation practice? Thanks for the prompt response, and yes I'll keep the rest of the members here updated.