I am the owner of a DX 5 which failed in february 2015. I never had any problem before. I live in FRANCE. I gave my synth for repairing and the guy told me that the mother-board's failure should probably be responsable.
I will appreciate a lot, some help from you, DX 5 is now a vintage keyboard but I love it for all it represents.
I thank you for your help and apologise for my american and the mistakes in my mail.