Hardware Installation - 22 -
7) BAT (Battery)
Thebatteryprovidespowertokeepthevalues(suchasBIOScongurations,date,andtimeinformation)
in the CMOS when the computer is turned off. Replace the battery when the battery voltage drops to a
low level, or the CMOS values may not be accurate or may be lost.
You may clear the CMOS values by removing the battery:
Turn off your computer and unplug the power cord.1
.
Gently remove the battery from the battery holder and wait for one 2.
minute. (Or use a metal object like a screwdriver to touch the positive
and negative terminals of the battery holder, making them short for 5
seconds.)
Replace the battery. 3
.
Plug in the power cord and restart your computer.4.
Always turn off your computer and unplug the power cord before replacing the battery. •
Replace the battery with an equivalent one. Danger of explosion if the battery is replaced with •
an incorrect model.
Contact the place of purchase or local dealer if you are not able to replace the battery by your- •
self or uncertain about the battery model.
When installing the battery, note the orientation of the positive side (+) and the negative side (-) •
of the battery (the positive side should face up).
Used batteries must be handled in accordance with local environmental regulations. •
6) PWR_LED (System Power LED Header)
This header can be used to connect a system power LED on the chassis to indicate system power sta-
tus. The LED is on when the system is operating. The LED is off when the system is in S3/S4 sleep state
or powered off (S5).
1
System Status LED
S0 On
S3/S4/S5 Off
Pin No. Denition
1 MPD+
2 MPD-
3 MPD-