Test mode

A test mode is a mode, usually hidden, inserted into consumer electronics by the manufacturers. They are generally only intended to be used by authorized maintenance people. Others sometimes discover them however, not always intentionally. Test modes usually include functions such as displaying test card images and testing moving parts, things that are generally useless to a general consumer who does not know anything about how the device works. Test modes are also included in audio games which tests every sound file in the game. The sound files are stored on a chip on the circuit board. Some test modes can be rapid-fire like the Bop It Shout and the Bop It XT and some test modes are manual like Bop It Beats which means that one button on the electronic device will play a sound, repeat a sound or go back one sound. Some test modes might be a menu where each function of the device will do something different to the other button. Some test modes may even have a hidden melody such as Tiger Electronics' Brain Shift game which plays Happy Birthday.