How to start a Dell Latitude XT2 in safe mode?

SOURCE: How do I enable presentation mode on an XT2

You could be able to enable presentation mode by pressing the "settings" button on the bootom of your display, next to the power button and the "ctrl" and the rotate button. After you press that, your dell control point manager should pop up and then go to the tablet tab on the left and open it. after that, go to the display tab and you should see an option that allows you to turn your presentation mode on.

SOURCE: How can you get the touch screen or pen work on

What OS are you using ? Windows Vista or Windows 7 ?
In order to get the buttons and touchscreen working, you need to install the proper drivers.
Go to http://support.dell.com/support/downloads/driverslist.aspx?c=us&cs=19&l=en&s=dhs&ServiceTag=&SystemID=LAT_XT2&os=WLH&osl=en&catid=&impid=
Select your operating system
and download the following drivers and install them in the following order :

1. System Utilities : - > Dell Utility : System Software
2. ControlPoint -> Dell - Application : ControlPoint System Manager
3. Input device drivers - > Ntrig Application

SOURCE: Dell Latitude XT2 sound doesnt work 1/2 of the time. Windows 7.

Download and install the drivers from manufacturer website. If you are unable to recognize the device specific drivers then i would suggest to use the driver scanning tool, it will search for the drivers online and will show a list of of device specific updated drivers.
You can download the driver scanner tool here:
www.DriverScanner2013.net

SOURCE: Dell Latitude XT2 fails to start up.

I know this is an old post, but the LED code for CAPS lock on, F4 flashing, F5 on means memory issue. I had this issue, reseated the memory, and the issue was resolved.