Technics Digital Piano - Keys Not Working

by Alex
(Cardiff, UK)

A couple of keys on my Technics digital piano have become dead.

Though the piano is about 8 years old (not very new), it is in very good condition.

It used to work perfectly fine till the last time I played it, but today all of a sudden I noticed that those two keys are not producing any sound.

Is it possible to fix just these two keys?

I hope the fix is doable and not very expensive.