First of all I want to thank everyone who is a part of makemkv and the great members of this forum. I bought myself an ASUS BW-16D1HT a few months ago to rip all my discs. I already ripped about 200 discs, but sometimes there are read errors when ripping UHD discs (~20%). So I thought it might be smart to get a second drive to make sure the read errors are not the drives fault. I bought a second ASUS BW-16D1HT. The seller said it was "untested", but I think I was just too naive  

  . I installed the drive a few minutes ago and it was recognized by windows and makemkv. The makemkv information is the same except for the serial number. The previous owner must have installed the 3.10 MK firmware. 
The drive tray works without a problem, but as soon as the drive closes makemkv says "No Disc". The drive does not even try to read the disc unfortunately. 
Any ideas what could be wrong with the drive?