Well, maybe. I got the HMD and linkbox back from support. The HMD was with protections on the glasses again, cable, headstrap and skin protection packed separately , so I think it might be a new/refurbished one. The linkbox I can't tell, could or could not be the same.
Could the linkbox be (still) broken? I connected the linkbox to a different PC/notebook in our home and when connected you can hear the distinctive Windows-sound when you plug in an USB-device several times. But right after that you hear the sound for un-plugging. And again for plugging/unplugging...continues endlessly.