M o t h e r b o a r d
5/18 OWNER’S HANDBOOK
How to replace the CMOS battery
When your computer is turned off, a lithium battery maintains the
current time-of-day clock and the values in CMOS RAM.
The battery should last about seven years. When the battery voltage
drops below a certain level, the Setup program settings stored in
CMOS RAM (for example, the date and time) might not be
accurate. Replace the battery with an equivalent one.
Warning
Danger of explosion if the battery is incorrectly replaced. Replace
only with the same or equivalent type recommended by the
equipment manufacturer. Discard used batteries according to the
battery manufacturer’s instructions.
To replace the battery, follow these steps:
1.
Observe the precautions detailed in the ‘Safety and Regulatory
Notices’ at the front of this handbook.
2.
Turn off and disconnect all peripheral devices connected to the
computer. Then turn off the computer and remove the power
cord.
3.
Remove the computer cover. To get clear access to the battery,
you may have to remove the system processor, or have an
approved service engineer temporarily jack the motherboard
out of the casing.
Caution
The motherboard must only be removed from the system case
by an approved service engineer. The user should not attempt
this procedure.
4.
Locate the battery on the motherboard using the illustration
on page 2 of this chapter.
5.
With a small non-metallic tool, gently pry the battery free
from its socket. Note the orientation of the “+” and “-” on the
battery.
