TestMode is much safer and easier to use than Hackmode - which installs and modifies your system. Sometimes the install goes awry, leaving your unit unable to boot.

 

To get into TestMode on most X and Z series units, download this file supertestmode.zip to a PC, unzip it, put TestMode.key on a FAT32 formatted SD, and insert it in your unit.

 

IFAIK this file doesn't work on  x950 & z150, but if it does, or someone knows one that works - please post to this thread.