Chosen Solution
The D# and A keys on my keyboard are not working in any octave. Help?
You should try cleaning the contacts underneath the keys. Here is an article: https://ourpastimes.com/how-to-fix-a-dea… Also, here is a video: https://www.youtube.com/watch?v=UQFknzlI…. This video shows the disassembly, but the guy uses a pencil to scrape the contacts. I would use isopropyl alcohol as mentioned in the article. In other words, follow the article, but use the video for visual reference for assembly/disassembly.
