So I took one of my MM-4 apart because something was rattling. Turns out it has a loose magnet assembly. It must have been dropped in shipping.
Figured it out. There is a small RF connector next to the flat ribbon connectors that go up to the screen. It apparently popped off and became wedged under the circuit board when I installed the new battery. I did notice a bit of grey fluff floating around at one point and didn't realize what it was. Should have been wearing magnifiers. Oh well. At least the new screen and battery work fine.
Update: Nor do I have Bluetooth. I looked at the article on bluetooth and wifi antenna and didn’t see anything that I’d knowingly damaged. Can anyone tell me what the most common cause would be for Bluetooth and wifi not to work after this? I believe it must be the antenna, as the two services do turn on and search for access points and bluetooth devices. The phone is able to connect to my fitbit if held right next to it. TIA.
Done, but no wifi afterward. Perhaps due to the struggle to remove the battery after the strips broke.
Nightmare. All three strips broke. I did get the battery out with a combination of dental floss, a guitar string, and a few cut-down credit cards. But the adhesive is very strong even when warmed, and the outer wrapper of the battery tore during removal. I was afraid of it heating up and sparking, as I have seen other damaged lithium ion batteries do.