Acnodes PCH 3591 - Manual (Page 13)

Figure 2.3: Jumpers and Connectors Location_
Board Bottom
2.3 Jumpers Setting and Connectors
1. RTC/SRTC:
(2.0mm Pitch 1X2 Pin Header)CMOS clear jumper, CMOS clear
operation will permanently reset old BIOS settings to factory defaults.
RTC/SRTC CMOS
OPEN NORMAL
(default)
CLOSE 1-2 Clear CMOS
Procedures of CMOS clear:
5.4.1.1 Turn off the system and unplug the power cord from the power outlet.
5.4.1.2 To clear the CMOS settings, use the jumper cap to close pins1 and 2 for about
3 seconds then reinstall the jumper clip back to pins open.
5.4.1.3 Power on the system again.
5.4.1.4 When entering the POST screen, press the or key to enter CMOS
Setup Utility to load optimal defaults.
5.4.1.5 After the above operations, save changes and exit BIOS Setup.
2. JP2:
(2.0mm Pitch 1X2 Pin Header), ATX Power and AT Power setting jumper .