Hi Mirko_Oliver ,
Sorry about this. It seems that the right mono camera is either broken or is disconnected internally.
Could you send us an email at support@luxonis.com?
Once we have your shipping address and contact phone, we'll get a new unit out to you ASAP.
This is the first time we've seen this failure. There's a high chance that the internal connector simply was not fully seated or got disconnected somehow.
Either way, we'll get you a new unit out ASAP. But in case you're curious, you could open up the unit, unscrewing the 4 front screws and the 4 back, and then 2 internal, to pull the PCBA out and see if the connector is disconnected. If it is, you could plug it back in and then have 2 OAK-D. :-)
Thanks, and sorry again about the trouble here.
-Brandon