Test mode
From Infogalactic: the planetary knowledge core
Lua error in package.lua at line 80: module 'strict' not found. 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.
See also
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