This information is for the Elo touch computers 1529L, 15A1, 15A2 and 17A2 models
On the side of the PC Touch are the volume, brightness, on / off buttons, and they are in the following order:
1.- Upload Volume
2.- Download Volume
3.- Upload Brightness
4.- Lower Brightness
5.- Off / On
To lock and unlock the on / off switch, press buttons 1 and 3, for 5 seconds until the phrase POWER LOCK appears and release. To unlock, the same procedure must be followed and the phrase POWER UNLOCK should appear.
To lock and unlock the menu of the side buttons (OSD MENU) you have to press the buttons 1 and 2, for 5 seconds, until the phrase OSD LOCK appears and release. To unlock, you must do the same procedure and the OSD UNLOCK phrase must appear.