Answered Help for a newbie...printer won't home properly

I am very new to this technology and need help. I have the Robo 3d R1. It was working properly and I got amazing prints for about a month. Today it was in the middle of a print when it suddenly skipped off the print and started extruding in mid-air. I canceled the print and tried again, but now the print head does not home properly. When it tries to home the X-axis, it goes all the way to the left and then there is a loud racket and the belt vibrates. It does this for a few seconds, then stops and tries again with the same result. Then the Y-axis starts to go up instead of down. Finally it tries to do its 9-point alignment in mid-air and tries to print in mid-air. I tried to shut off the printer, reboot my computer and restart the printer with no change. Please help.

 

Thank you so much!!! I checked and it seems the nuts for the z-axis were misaligned and preventing the x-axis from contacting the home switch. Again, thanks for helping newbie.
Jack