ESQ1 behaving odd

When I first turn it on after it has not been played for a while, everything works fine. And then 5-10 minutes later it starts playing notes by itself randomly. Usually it will end up holding one tone that won’t stop. During this, the display blinks on and off but not entirely, only in certain areas. I’m thinking its voltage/heat related? Has anyone experienced this?

This probably won’t solve the problem, but reinitializing often does work wonders. Have you tried this?

If you have, and the problem persists, then we can look at what to try next.

I did try reinitializing, but no luck.