Aaeon SBC-770 User Manual page 31

You can use J2 to clear the CMOS data if necessary. To reset the
CMOS data, set J2 to 2-3 closed for just a few seconds, and then
move the jumper back to 1-2 closed.
J2
*default
You can select the LCD connector CN6 (pin 5 and pin 6) driving
voltage by setting J4. The configurations are as follows:
J4
*default
20 SBC-770 User Manual
Protect*
1 2 3
5V
1 2 3
Clear CMOS
1 2 3
3.3V *
1 2 3