Hi.
Really bad luck if you have to replace the mainboard.
Have you tried the factory reset by press the 8 Beat2,
Jazz Rock & Soul and the Dance Pop buttons and keep it
down when turn on the keyboard?
GJ
_________________________
Cheers 🥂
GJ
_______________________________________________
"Success is not counted by how high you have climbed
but by how many you brought with you." (Wil Rose)