Hello,
My name is Ankit and I work for the Social Media and Community Team at Dell.
I understand that you are getting an error message of "PXE-MOF" while booting up the system.
In order to check for issue, you can run inbulit diagnostic test for hard-drive on the system.
To access diagnostics on the system, you have to shut down the system. Then press down the f/n key towards the left hand side bottom of the keyboard & press the power button & let them go.
It will run the diagnostic & if there is any problem with the hard-drive for the system, it will popup an error code which you can report to Dell.
You can also check if system is working in safe mode or not.
To access safe mode, shut down the system & while restarting, keep tapping F8 key. It should take you to advanced boot options from where you can access safe mode.
If system works in safe mode, you can try system restore. If system doesnt boots up in safe mode, then you can try to restore the system to factory default settings. This option results in data loss.
To access PC restore, you can follow the following link.
http/support.dell.com/support/topics/global.aspx/support/dsn/detectos?type=force&lx=181316&lv=336966&l7=362066
For any further queries, feel free to reply back on the post.
Thanks
Dell-Ankit