Component ID - Accidentally knocked off

[MikeSD]

Question 1:
I accidentally used the wrong hole to put a screw in, and it knocked off
a component next to the IR sensor, while doing repair. I think it was a capacitor. But I can't
find the component to check. I did see it at one point. It had
solder band contacts on both ends. But when I was trying to set it
aside, it disappeared.

I don't use the IR sensor, if that's what it was for, but I'd like to
fix it if I can identify the part.

2nd Question:
What is the center tab on the top part of the NFC charger pad. It has
exposed copper but there is no copper to touch. Thinking it might be a temp sensor. The NFC charger isn't working now. When assembling, that
tab went on the wrong side of the cap and got smooshed.

Photos: ipscone.com/photos/955/

Thanks
Mike

 

[MikeSD]

Turns out the IR was actually Iris scan chip and the other comp was something to do with mic.

Still need to ID the missing comp. I have found some assy drawings but they dont gove values of comps.

Anyone know what the missing comp value is? See pics in link

http://ipscone.com/photos/955/pads.jpg

 

[MikeSD]

Slowly but surely. I've got my charging working. Bad nfc charging antenna. The small tab was relevant.

I've also determined the missing component is from the top mic circuit. That mic isn't functional. I think it was a cap. since part of the mic circuit replacing should be easy. Comp not as critical as if it was in a timing circuit. Still would be nice to know value.

The chip it connects to is marked

S1811
1964

If I can ID the chip, I can figure out the comp and a workable value.

Iris scanner works fine, so phone is fully functional, minus the top mic