POST /api/debug/display/start/ and POST /api/debug/display/stop/

Display test that temporarily overrides the normal image, contrast, and backlight.

Auth: Bearer (powerUser).

POST /api/debug/display/start/

Enables the display override.

{
  "mode": "checkerboard",
  "contrast": 34,
  "backlightPercent": 80
}

Field	Type	Required	Description
`mode`	string	yes	Display mode: `normal`, `black`, `white`, `grid`, or `checkerboard`
`contrast`	integer	yes	Display contrast, from 0 to 64
`backlightPercent`	integer	yes	Backlight brightness as a percentage, from 0 to 100

Mode	Image
`normal`	Normal screen content with temporary contrast and backlight settings
`black`	All pixels on
`white`	All pixels off
`grid`	Grid with 8-pixel spacing
`checkerboard`	Checkerboard with 8 x 8-pixel squares

Calling start again replaces the current mode and restarts the safety timeout.

{}

Disables the override and restores the normal image, contrast, and backlight control.

No request body is required.

{}

The override is automatically disabled after 305 seconds, even if the client does not call stop.