Roland VR-09 Out of tune a whole step down

Help!!
My Roland VR-09 I bought it new around 10 years ago and now only my piano and synth keep going out of tune a whole step down but the organ doesn’t go out it stays in tune. I reloaded the keyboard and all its updates and it worked perfectly for a few minutes but as soon as I used my note bender it went back out of tune… I even bought and installed a brand new modulation switch but still no luck