User`s guide
78 Chapter 05: Troubleshooting
Battery Problems/Solutions
Problem Possible Cause Solution
Beeping sound. The Tablet’s bat-
tery is low and
Hibernation mode is
disabled.
Connect the computer to an external
power source immediately.
The battery pack is
warm after charging.
This is a normal
condition.
No action is required.
The battery LED
indicators do not
light up whether the
battery is charging
or not.
No power is
connected to the
computer.
Check the power source and make sure
the AC adapter is securely plugged into
both the eo a7400 and the power outlet.
The battery is above
10% charged.
Check the battery indicator icon in
the System Tray (
) of the Windows’
Taskbar. When not attached to a power
source, the LED indicator will only light
up if battery power is very low.
A battery pack is
nearing the end of
its life.
Replace the external battery pack. Use
only batteries recommended for use
with the eo a7400 Ultra-Mobile Tablet
PC. Contact support if you suspect the
internal battery requires replacing.
Battery life icon in
System Tray (
)
is not accurately
displaying the
remaining charge.
Batteries requires
calibration.
Calibrate the batteries as specied in
the chapter entitled Battery Care and
Usage.
The battery pack is
nearing the end of
its life.
Replace the battery pack. Use only bat-
teries recommended for use with the eo
a7400 Ultra-Mobile Tablet PC.
Battery pack will
not charge when
attached to power
source.
Power source volt-
age exceeds battery
specications.
The smart battery pack in your eo a7400
will shutdown and refuse to charge is
power amperage or voltage exceeds
its specications. Check to make sure
the power source is within range of the
power specications listed on the AC
adapter that came with your eo a7400
Ultra-Mobile Tablet PC.
Battery pack has
overheated.
Shutdown the eo a7400 and allow the
battery to cool down before restarting.
AC adapter is not
compatible with eo
a7400.
Check to make sure that the AC adapter
used to charge the batteries is the
adapter that came with your eo a7400.