Jetway Computer NF9E - Manual (Page 17)

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(9)CASE_OPEN(2-pin): Case Open Message Display Function Select
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.