My camara has this black font on the screen.

Based on the information provided, it seems that you are experiencing issues with your Samsung NX1000 camera after inserting the battery. Here are a few suggestions that you could try to troubleshoot the issue:

1. Check the battery: It's possible that the battery may be faulty or not properly charged. Try charging the battery using the camera's charging cable or a separate charger, and then reinserting it into the camera.
2. Check the battery contacts: Ensure that the battery contacts on the camera and the battery are clean and free from any debris or corrosion. You can use a soft, dry cloth to clean the contacts.
3. Reset the camera: Try resetting the camera to its default settings. This can sometimes help resolve software-related issues that may be causing the problem.
4. Check the display settings: Ensure that the display settings are not set to "Off" or "Power Saving." You can access these settings in the camera's menu.
5. Contact Samsung support: If none of the above steps work, it may be best to contact Samsung support for further assistance. They may be able to provide additional troubleshooting steps or arrange for a repair if necessary.

I hope these suggestions help resolve the issue with your Samsung NX1000 camera. Good luck with your troubleshooting efforts!