I was replacing my LG V20's headphone jack after it quit working and I accidentally popped off a small metal part from the motherboard. I'd like to know what the part does as it hasn't caused any problems yet. I've included an image and wondering if anyone can help, or tell me how I can reattach it.
Yeah. I just took the whole phone apart (many times) and replaced the screen.
That golden part is a contact point to the case. It's electrical GROUND, or negative.
It is the same as the contacts next to it, right and left. So that's why you're ok.
Optimally, if you can find it and have the skill and tool to solder it back, you should. At low frequencies, contact points near each others are the same. However, at Gigahert frequencies, as in the clock speed of the motherboard, notice that they are spaced out at specific distances (a function of the wavelength frequency), they should make better signals. This is noticeable if you're at borderline situation, like a noisy environment. But at high signal environment, you won't notice the difference.
Sounds like you're in a good environment.
I miss one of those, too. And I lose Wifi signal which makes me wish that I can find one to buy.