70 Chapter 4

Check the Battery Pack

To check the battery pack, do the following:
1. Power off the computer.
2. Remove the battery pack and measure the voltage between batter y te rminal s 1(+) an d 7(groun d). See t he
following figure
3. If the voltage is still less than 8.0 Vdc after recharging, replace the batt ery.
To check the battery charge operation, us e a dischar ged batter y pack or a batter y pack that has le ss than 50%
of the total power remaining when installed in the computer.
If the battery status indicator does not light up, remove the battery pack and le t it ret urn to room temperature.
Re-install the battery pack.
If the charge indicator still does not light up, replace the battery pack. If the charge indicator still does not light
up, replace the system board.
Touchpad Check
If the touchpad doesn’t work, do the following actions one at a time to correct the problem. Do not replace a
non-defective FRU:
1. Reconnect the touchpad cables.
2. Replace the touchpad cables.
3. Replace the touchpad.
4. Replace the system board.
After you use the touchpad, the pointer drifts on the screen for a short ti me. This sel f-ac ting point er movement
can occur when a slight, steady pressure is applied to the touchpad pointer. This symptom is not a hardware
problem. No service actions are necessary if the pointer movement stops in a short period of time.