Hatteland Display 26 inch - HD 26T21 MMD (Widescreen, Touch Screen) - Manual (Page 73)

73 User Controls
OSD Menu Functions
IND100064-38
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Service - Test Pattern
Will show the internal test pattern with greyscales, colors and raster patterned boxes to check for
deviations in the TFT panel/display controller behaviour. It is independent of any current resolution
or specifications found in the signal inputs. The test pattern is generated internally in the display
controller and is sent 1:1 directly to the TFT panel. It can be useful during trouble-shooting
situations to determine the source of a display or connectivity problem regarding external
equipment.
To active this function, touch the “MENU” button.
● Note: This function will not inform/report any deviations directly, you need to have the required technical
expertise to interpret the test pattern displayed.
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Service - Burn In
Sets the unit into “Burn In” mode and enables to write EDID data. More information to follow.