Alesis QX49 - Auto-modulation??


I have a big issue with my Alesis QX49. It seems to auto-modulates, as I can see the numbers randomly going up and down while I'm playing. It is so annoying that I can't just play or record anymore !
Is there anything I can do? I already tried to Reset with Loop+Record buttons while powering on, but nothing changes...

Thank you in advance for your help,
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