Chosen Solution
Hi, I was wondering how do I go about repairing the battery connector area.
The phone had been exposed to some seawater after the adhesives came apart, and caused a short circuit and burnt the connectors together (both board side and battery flex cable side). I believe that the vbat(?) and temp sense pads have been lifted off together with the burnt power connector component. The other pads still have some copper on its surface for soldering. How do I fill and restore a makeshift pad? I have tried using a hot air gun, but I believe the board is too cold for solder paste to melt together. I don’t own a rework/reflow station, and hoping not need to purchase one. I was thinking if a lower temperature solder paste would work? Or would silver conductive epoxy such as MG 8331S can be used to remake the pads (not sure if solder can join on top of the silver epoxy)? I’m trying to resolder this SMD part (https://phoneparts.mt/product/samsung-bo…) back onto the board. Thank you. Edit1: Picture of the area around. (It’s still a stacked motherboard.)
Edit2: Schematics of the logic board.
@zacksg I don’t think that any epoxy will work here. The old solder pads are pretty much non-existing and there is an awful lot of copper exposed which may just lead to further short-circuits. See if you can get a boardview on this and where those pins are connecting to next. Then run jumpers from the new connector to the first component of that circuit instead of trying to rebuild something that really isn’t there anymore
