Hi Micco,
I hope you have made back-up disks.
If so try this trick: hlod down
DSP(4~7)& SLOW/FAST & EXIT
buttons at the same time while turning on your KB.
This will initialize all data. Then load up your back-up disks
It worked for me.
Hope this helps
Eric
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Genos, PSR-S970, TC Helicon VoiceLive3, Mackie 802-VLZ3 Mixer, 2 Bose L1 Pro16, Electro-Voice ZXA1 Subwoofer