Hello!
I bought a second hand 60HE from Tweakers and I suspect it to arrive somewhere tomorrow. I'm actually super excited about it! The one I got comes with pixel universe keycaps as shown on the image that I have edited. The board still has around three and a half years of warranty left so I'm pretty happy about that.
I was just wondering if, besides tapping the keys ofcourse, there is another way to ensure whether the keyboard is fully functional?