Hi all, first post so I hope that I am doing this correctly. I recently purchased a keyboard secondhand that was working fine the several days until a single column of keys stopped responding (F1, 1, Q, A, WIN). I have just about no experience when it comes to this and when using a multimeter, I had absolutely no clue what was looking for. However, I did this one thing that stood out to me (again, no experience) and figured that maybe it could be useful in diagnosing the problem.
The PCB is millmaxed and I went ahead and flowed a bit more solder in case there that could have been an issue with the affected keys. There seems to be continuity along the vertical traces for the affected column (I think) but yet nothing seems to happen when a switch is installed.
Here is a demonstration of what I found. WARNING: sound may be loud and I apologize in advance. Again, I have no idea what I am doing but I am certainly willing to learn as getting a replacement PCB may be next to impossible anyhow
If there's anything else I should know or anything else I could do through this process, I can do it as soon as possible. I appreciate the help in advance!