Out of warranty? You bet! In 18 months the Casio will be 16 years old, and will go to Iraq!
After I had the board for some years, I opened it up, partly to see what is inside, partly to clean it. I smoke, so the first thing to do was vacuum the ashes from inside the keyboard. I have infinite patience when it comes to dissasembling things and putting them back together. Had a very old 49 key Lowrey (probably from the late 80's) a friend gave me, and aftes some months one F key stopped working. Teared it apart, found and cleaned the contact, It lived for a year or two.
Actually I can't help it, I have been opening up things (especially electronics) since I was old enough to hold a screwdriver. Curiosity is running in my veins. Thankfully I am not a cat, I would be lond dead by now.
First one I remember was a portable transistor radio back when I was less than 5 years old. A Mitsubishi one. One screw in the back, a round edge kitchen knife, and voila!.
Every time a technician came to mend our black and white TV, I was literally on his back, just to see what he does. Plumber doing bathroom fixtures, I was game. Electricians taking care of wall sockets, I was ecstatic. Saved maybe 2 or 3 TV technician visits after I saw what potensiometers he was turning to control V-size and brightness and trimmed them myself when the TV was on its last legs. My wife comes from a totally different background, nobody was a "handyman" in her house so it seems strange for her.
If there are monetary or time constraints, os simply you have the time, why not try to mend it yourself? Simple things like electrical contacts and such, are probably very easy to replace.