Advantech SIMB-M21 - LVDS Back Light Power Selection; AT;ATX Power Mode Select (PSON1)

SIMB-M21 User Manual 24
2.7.4 LVDS Back light power selection
2.7.5 AT/ATX Power Mode Select (PSON1)
This jumper allows you to select ATX Mode or AT mode.
+5 V +3.3 V
ATX MODE (Default) AT MODE