Had a moment with a 10 year old laptop where I saw the same bad solder joint three times
A guy brought in a Dell Latitude from 2014 that would not turn on. I checked the power jack and saw a cold solder joint on the board connector, a common fix. After I fixed it, it came back a month later with the same issue, and I saw the joint had cracked again. The third time, I used a different flux and more heat, and it has been fine for six months now. How do you all handle those old, worn boards that just don't want to take new solder?