Yamaha PSR E203 F chord out of tune
I've noticed that when I play the F chord F-A-C it sounds out of tune. The display screen shows that an extra note is being added to the chord F-A-B-C. I have even tried the F inversion C-F-A and I get C-F-F#-A on the display. I've reset the settings but the problem is still there.
Thank You in Advance for your Help.