Right arrow key not working

Hello everyone,

My XPS15 9510 laptop has developed a problem that I can't figure out the solution to: the right arrow key stopped working. At first there was no problem, then the key started having an erratic behavior where it would work some times but not always and now it seems simply to be dead.

The right arrow key does not work in either of my dual-boot OS's and neither does it on the BIOS setup environment. The key seems to be OK mechanically, and its backlight works fine aswell. Every other key works fine.

I'm at my wit's end and wondering if this is simply malfunctioning hardware?

Thanks in advance for any help you can provide.