Jetway Computer JBC231C9P-2550 - Manual (Page 14)

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(3) JP2 (3-pin): Mini PCI-E Power 3.3V/ 3VSB Function Select
2-3 closed：MINI PCI-E Power=3VSB
JP2
JP2
1-2 closed：MINI PCI-E Power= VCC 3.3V;
1 3
1 3
(4)CASE_OPEN (2-pin): Case Open Message Function
1-2 closed : Case Open
COPEN
COPEN
1 2
1-2 Open: Normal;
1 2
Pin 1-2 shorted: Case open display function enabled. Use needs to enter BIOS and
enable ‘Case Open Detect’ function. In this case if you case is removed, next time
when you restart your computer a message will be displayed onscreen to inform you
of this.