Asus A88X-PLUS/USB 3.1 A88X-PLUS/USB 3.1 Users manual English - Page 12

• Hard disk drive activity LED (2-pin HDD_LED) PANEL This 2-pin connector is for the HDD Activity LED. Connect +PWR_LED- PWR_SW SPEAKER the HDD Activity LED cable to this connector. The HDD LED lights up or flashes when data is read from or written to the HDD. PLED+ PLEDPWR Ground +5V_SPKO Ground Ground Speaker HDD_LED+ HDD_LED- Ground RESET NC PLED+ PLED- • System warning speaker (4-pin SPEAKER) PIN 1 This 4-pin connector is for the chassis-mounted system warning speaker. The speaker allows you to hear system beeps and warnings. • ATX power button/soft-off button (2-pin PWR_SW) This connector is for the system power button. +HDD_LED- RESET +PWR_LED* Requires an ATX power supply • Reset button (2-pin RESET) This 2-pin connector is for the chassis-mounted reset button for system reboot without turning off the system power. USB+5V USB_P3USB_P3+ GND NC 8. USB 2.0 connectors (10-1 pin USB34/56/78) These connectors are for USB 2.0 ports. Connect the USB module cable to any of these connector, then install the module to a slot opening at the back of the system chassis. These USB connectors comply with USB 2.0 specifications and supports up to 480Mbps connection speed. Never connect a 1394 cable to the USB connectors. Doing so will damage the motherboard! USB34 PIN 1 USB+5V USB_P4USB_P4+ GND 9. Clear RTC RAM (2-pin CLRTC) This header allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can clear the CMOS memory of date, and system setup parameters by erasing the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in CMOS, which include system setup information such as system passwords. To erase the RTC RAM: 1. Turn OFF the computer and unplug the power cord. 2. Use a metal object such as a screwdriver to short the two pins. 3. Plug the power cord and turn ON the computer. 4. Hold down the key during the boot process and enter BIOS setup to re-enter data. +3V_BAT GND CLRTC PIN 1 If the steps above do not help, remove the onboard battery and short the two pins again to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the battery. 1-4 Chapter 1: Product introduction