For the little knowledge I have with soldering. Use proper heat, always clean up the joints (with a solder wick) before applying new solder (probably unnessary), USE FLUX!!!, and take your time!I better start learning how to Solder let alone Micro-solder and fast hahaha
Magnifying glass and a card holder is a nice thing to have.
https://www.build-electronic-circuits.com/soldering-tools/ a list you can use to buy things.
EDIT: Got a multi meter? Maybe you can just find the bad pin instead?
Last edited by linuxares,