For example to check how many hours the monitor has been on?
⚠️ Changing settings in the service menu of a Dell monitor could void your warranty. Only proceed if you know what you are doing and are willing to take that risk
- Connect the monitor with either a hdmi or display-port input source (usb-c won't work, at least not for me)
- Make sure monitor is turned off
- Press & hold enter using the joystick (enter is just the center of the joystick)
- Double click on the power button (while holding enter down with the joystick)
- Wait for the power led to start blinking
- Release the joystick
- Wait for the monitor to fully turn on
- Press up using the joystick
- When done, power cycling the monitor will get you back to normal mode (and the power led stops blinking)
If you follow the same steps starting from 2. but without any input connected, the monitor will cycle between colors