Lifebook S6210 Power Jack
Now, the power jack is an Achilles heel for a lot of laptops/notebooks, but this one takes the cake. The jack is totally unsupported aside from the the posts on the board, which while crappy is also normal, but for the connection it has a springy lump at that top, causing the insert to cantilever the whole thing a little, especially when stressed at all, and pop the negative terminal post, which is the one towards the back.
It’s also a pain to get apart, but I found this great writeup on doing it. The model is different, but it’s 90%+ the same.