Epson 4SLC2-50 - Manual (Page 81)

You can also exit the Setup program without saving the new
selections to CMOS RAM. Select the DO NOT WRITE TO CMOS AND
EXIT option. The program asks you if you want to quit without
saving the current settings. Press
Y and Enter. The system restarts
with the previous configuration settings.
Changing the Standard CMOS Setup
When you select the STANDARD CMOS SETUP option from the
main menu, you see this screen:
Press or to move to the option you want to change.
The Setup program displays information about each option as you
highlight it. Use
PgUp or PgDn
to change the value of an option.
Press E
SC
to return to the main menu.
Running Setup 5-5