Jetway Computer NF76 - Manual (Page 14)

(5) JP5: Panel backlight power on/off (3-pin)
9
(6) JP8: COM1 Pin 9 select
2-3 closed : backlight on
JP5
JP8
1-2 closed: 3-4 closed : +12V
1
RS232
1 1
5-6 closed : +5V
3
1
JP5
3
1
1-2 closed: backlight off