Sorry I cant speak Spanish. I had same problem.
The problem is camera connector not pressed hard enough.
I fixed it by adding a thin plastic to further press the camera.
To test if your problem the same as mine:
Reboot the phone.
Press the camera with your finger, then click the camera app while still pressing the back camera.
If the camera works, then your problem is the same with me.
Read this:
http://forum.xda-developers.com/show....php?t=2553350