Tyco Electronics ELO TOUCHSYSTEMS TOUCHCOMPUTER 1520 - Manual (Page 37)

Elo TouchSystems 1520 User Guide 37
Using the Arrow UP or DOWN key(s) on the keyboard to select the CD/
DVD drive you are using. When selected press ENTER.
When prompted, press any key to boot from the CD.
The following two screens should appear.
2. Select the option to recover operating system.