Acer Aspire 9300 Service Manual page 90

If the PS/2 mouse does not work, then click if the main board to switch board FPC is connected
3.
properly.
If the main board to switch board FPC is connected correctly, then check if the FFC on the
4.
touch pad PCB is connected properly.
If the FFC on the touch pad PCB is connected correctly, check if LS851 JP1 Pin6 = 5V are
5.
pules. If yes, then replace switch board. If not, then go to the next step.
Replace the touch pad PCB.
6.
If the touch pad still does not work, then replace the FPC on Track Pad PCB.
7.
After you use the touchpad, the pointer drifts on the screen for a short time. This self-acting pointer
movement will occur when a slight, steady pressure is applied to the touchpad pointer. This
symptom is not a hardware problem. No actions are necessary to be taken if the pointer movement
stops in a short period of time.
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