Locate your CMOS battery
Open the computer case and find the battery on
the computer motherboard
verify that it will be accessible and that it can be removed. Most
computers today use a coin cell CMOS battery as shown in the image to
If you are unable to locate your CMOS
battery you will need to refer to your motherboard or computer
documentation and/or contact your computer
for additional assistance in locating it. Obtain battery information
most manufacturers will not list the exact type and model of your CMOS
battery; therefore, once you have located the battery, write down all
information about the battery (Voltage, chemistry, wiring, and
packaging). If possible, remove the battery and take it to the location
you plan on purchasing a new battery from.
buying information can be found on our battery buying tips
Removing the battery Caution:
While in the computer make sure you're aware of Electro Static Discharge
, your computer is off, and that you're properly grounding
yourself. Especially before removing the battery.
you're computer is using a coin cell battery similar to the above
example picture. Removing the battery is relatively simple. Simply use
your fingers to grab on the edge of the battery and pull it up and out
of the container holding it. Some motherboards have a clip holding the
battery down. If your computer has this clip you may need to use one had
to move the clip up and the other hand to pull the battery out.
Unfortunately, not all CMOS batteries are removable; some
manufactures will only allow a replacement battery to be added. If
you're not using a coin cell battery and are not able to determine how
to remove it refer to your motherboard or computer documentation and/or
contact your computer
for additional assistance in removing the battery or
how to insert a new replacement battery.
computers that do not have removable batteries only options to install a
new battery will most likely also need to set a jumper
adding the new battery into their computer.
Once you have purchased a new
battery, remove the old battery (as instructed above) and replace it
with the new battery. Enter CMOS values
Once the battery is replaced turn on the computer and enter
all values back into CMOS or set the values back to the default
settings. Additional information about getting the values back to
default can be found on document CH000970.
values have all been entered make sure to save the settings before
exiting. Many CMOS setups allow you to press a key (such as F10) to save
values and exit all in one action.
If after following all the above
steps you continue to experience the same error when your computer
starts and/or your computer is still unable to keep the stored values
it's likely that you're experiencing a more serious issues. Most likely
causes are bad power
or bad motherboard