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ASUS PU-DLS/PU-DL motherboard user guide
2-3
2.3 Before you proceed
Take note of the following precautions before you install motherboard
components or change any motherboard settings.
1. Unplug the power cord from the wall socket before touching any
component.
2. Use a grounded wrist strap or touch a safely grounded object or to
a metal object, such as the power supply case, before handling
components to avoid damaging them due to static electricity.
3. Hold components by the edges to avoid touching the ICs on them.
4. Whenever you uninstall any component, place it on a grounded
antistatic pad or in the bag that came with the component.
5. Before you install or remove any component, ensure that the
ATX power supply is switched off or the power cord is
detached from the power supply. Failure to do so may cause
severe damage to the motherboard, peripherals, and/or
components.
When lit, the CPU power fail LED (CPULED1) indicates that the CPUs
installed are not identical. Make sure to install identical CPUs if you
wish to use the dual-processor capability. This LED does not light up if
you installed only one CPU.
When lit, the standby power LED (LED1) indicates that the system is
ON, in sleep mode, or in soft-off mode, a reminder that you should shut
down the system and unplug the power cable before removing or
plugging in any motherboard component.
PU-DLS
®
PU-DLS Onboard LED
CPULED1
ON
CPU Failure
OFF
CPU OK
LED1
OFF
Powered
Off
ON
Standby
Power