If the display is unreadable because of extreme display backlight and contrast settings or wrong display language, you can perform a display reset. A display reset temporarily restores the display backlight and contrast to their factory settings and returns the display language to English.
For the display reset, access the DTR keyboard directly. Then perform the following steps.
- Switch off the DTR power.
- Press and hold the decimal point key on the keyboard.
- Switch on the DTR power.
Hold down the decimal point key until the DTR has started completely and you see the
The reset on the display language is temporary and the language returns to original next time the DTR is powered off, except if the language is permanently changed through the display settings menu.