YPG-235 Keys sometimes not working

I bought a Yamaha YPG-235 about 2 weeks ago, and have recently noticed that the E to the left of middle C occasionally doesn't make sound. I'm not sure what is causing this, and don't know if there is an easy fix.

Any solutions?

I few months ago, I successfully repaired 2 dead keys on a used keyboard (see other thread). Old keyboards may need some cleaning from time to time.

But if your keyboard is brand new (and still under warranty), I would not try to repair it myself...

If a keyboard is still under warrantly, never repair it by yourself...

And by the way.... What a lot of spam do i see...