P4S5A Setting Jumpers Jumper JP4 JP3 Description Setting (default) Clear CMOS jumper 1-2: Normal Onboard LAN LED Jumper 1-2: Link LED 2-3: Clear CMOS 1 JP4 JP3 3-4: LED Active 1 JP4: Clear CMOS Jumper Use this jumper to clear the contents of the CMOS memory. You may need to clear the CMOS memory if the settings in the Setup Utility are incorrect and prevent your mainboard from operating. To clear the CMOS memory, disconnect all the power cables from the mainboard and then move the jumper cap into the CLEAR setting for a few seconds. JP3: Onboard LAN LED Jumper If you have a set indicator LEDs for the onboard LAN communication, you can connect the LED cable to the jumper JP3. Pins 1-2 are for LINK LED. Pins 3-4 are for 10/100 Mbps mode LED, the onboard LAN run in 100 Mbps mode when the LED lit.
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