72 Chapter 4
2. Remove the battery pack and measure the voltage between b attery terminals 1(ground) and 7(BT+). See
the following figure
3. If the voltage is still less than 7.2 Vdc after recharging, replace the battery.
To check the battery charge operation, use a disc har ged battery pack or a batter y pack that has less tha n 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 let 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 DC/DC charger 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.
3. Replace the main board.
After you use the touchpad, the pointer drift s on the screen for a short time. This self-act ing pointer 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.
1
45
23
6
7