My "Page Up" button broke on my MSI Prestige 15 A11SCS-225. Can I buy a replacement there?
Either look at the manufacturer or maybe at Amazon. And possibly directly in any China shop in China.
I once looked for a replacement fan for a graphics card, which was not available anywhere in Germany and not from the manufacturer. But I was able to order it online at a Chinese shop for electronics accessories.
Or search here:
Ask at a PC repair shop, they often have things lying around.
Doesn't have to be broken at all, take a look at the white plastic thing, sometimes these nylon buckles just have to hook into each other and the button works again.
The button is broken. The ticks that are supposed to be hooked have broken off.