Hello, my name is Martin. I am a musical keyboard technician in Argentina, and I see that this problem is very common with this keyboard. Some time ago, I was able to obtain the A1000 Service Manual, as well as the original software for this model with its guide, which are difficult to obtain since it is of Chinese manufacture. Many people claim to have these files, but all the ones I have seen so far are not genuine. I offer them for USD 20, which I believe is a fairly reasonable price considering the hours of effort I have dedicated to having the factory provide them to me. I can send photos and videos to clarify doubts before payment, for your greater security. In addition, you will keep the files and will be able not only to repair this great keyboard, but also to do whatever you want with those files afterward. I believe the effort deserves to be rewarded. To obtain them, I leave you my contact information: Email: (e-mail address removed) / Whsp: +5493764629187