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. After rebooting, run Tracking Pad PS2 Mode Driver. For example, run Syn touch driver.
  2. Run utility with the PS/2 mouse function and check if the mouse is working.
  3. If the the PS/2 mouse does not work, then check if the main board to switch board FPC is connected O.K.
  4. If the main board to switch board FPC is connected well, then check if the FCC on touch pad PCB connects properly.
  5. If the FFC on touch pad PCB connects properly, then check if LS851 JP1 Pin6=5V are pulese. If yes, then replace switch board. If no, then go to next step.
  6. Replace touch pad PCB.
  7. If the touch pad still does not work, then replace FPC on Track Pad PCB.

After you use the touchpad, the pointer drifts on the screen for a short time. This self-acting 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.

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