Surely, you would know they're running because they work?
I have some boxes that have no led (anymore). If no picture comes on (which hasn't happened to date), I would know they are not running.
Hasn't really been a problem so far.
Sorry for not making myself clear : what I meant to say is that there is no way to tell whether they are completely powered off (no LED if available), in Standby (red LED) or running (blue LED), where in the latter case I assume the TV/monitor is switched off. So, I am wondering whether anyone knows a way to make something light up on the front panel if that is what the box features.
This is relevant for a use case where you might run the box 24/7 also or even mainly as a VDR. Then, if, like me, you are a real "Serienjunkie", this is what you might want.