Checking Operational Charging.
To check operational charging, use a discharged battery pack or a
battery pack that has less than 50% of the total power remaining when installed in the computer.
Perform operational charging. If the battery status
indicator does not turn on, remove the battery pack and let
it return to room temperature. Reinstall the battery pack.
If the charge indicator still does not turn on, replace the
battery pack.
If the charge indicator still does not turn on, replace the
system board. Then reinstall the battery pack. If the
reinstalled battery pack is not charged, go to 'Checking the Battery Pack'
for any BUG on this page found - Thank you.