I figured it was a key matrix issue since all the function buttons stopped working aswell.
Good news though, its still under warranty. I sent it in this morning.
Thank you for your reply, i appreciate it!!
I purchased a Casio CDP130 quite a while ago now and quite a few of the keys stopped working.
Keys: A1; A#;1 F1; F#1; C#2; D2; A3; A#3; B3; C3; C#3; D3; D#3; E3; F3; F#3; C#4; D4; A5; A#5; F5; F#5; C#6; D6; A7; A#7; F7; F#7 are all dead and produce no sound or input via midi.
Anyone know what could be the cause and best course of action?