This article provides the steps for accessing the firmware settings on an Elo 1502L monitor

1. Power off the 1502L.
2. Press and hold the select button, while holding select, press and hold the power button, after a few seconds, the display will turn on and you can release the buttons.
3. Press the menu button. There should be a letter “F” in the top left corner of the menu options.
4. Use the arrow buttons to highlight “F” and press select. This will take you to the firmware setting.
5. Once done, just power the 1502 off and back on again.