M o t h e r b o a r d F e a t u r e s & U p g r a d e s
5/14 OWNER’S HANDBOOK
CAUTION
If the fan-sink power cable is not reconnected properly the processor may
overheat and be permanently damaged.
19. Adjust the processor voltage and bus speed selection jumpers
in block
PL19
as described at the start of this chapter.
When you have finished, replace any expansion cards you needed to
remove, then refit the system unit panels.
Replacing the configuration battery
The computer keeps a record of its current hardware configuration
in a CMOS memory chip which is sustained by a small battery.
This battery has a life of up to 5 years. If you find that you have to
reconfigure the computer every time you turn it on, the battery is
probably failing and needs to be replaced.
The battery is a 3 volt lithium type (CR2032 or equivalent)
typically used in calculators and other small, battery-powered
electronic items.
To replace the battery
1. Turn off the computer and unplug all power cords.
2. Take suitable anti-static precautions and remove the right-
hand side and top panels. For more information see the section
on “Anti-static precautions” in the
Safety & Regulatory Notices
at the start of this manual.
3. Lay the system unit on its side.
4. Remove the two screws that secure the rear drive bay to the
chassis and take the bay out of the system unit.
5. Using a non-conductive implement, release the latch that
holds the battery in place. The battery will pop up allowing
you to lift it out of the holder.
