the screen automatically for a short time. This self-acting
pointer movement can occur when a slight, steady
pressure is applied to the TrackPoint pointer while the
computer is powered on or while the system is running, or
when readjustment is required because the temperature
has exceeded its normal temperature range. This
symptom does not indicate a hardware problem. No
service actions are necessary if the pointer movement
stops in a short period of time.
If a click button problem or pointing stick problem occurs,
do the following:
1. Go to the Easy-Setup menu.
2. Move to an item with the pointing stick.
3. Press any one of the three click buttons.
4. Verify that the item is selected.
5. Move to another item with the pointing stick.
6. Press the pointing stick (press-to-select).
7. Verify that the item is selected.
8. Verify that all buttons work correctly.
If either the pointing stick or the click button does not work,
do the following actions one at a time to correct the
problem. Do not replace a nondefective FRU.
 Reseat the TrackPoint cable.
 Replace the video card.
 Replace the system board.
ThinkPad 770 (9548, 9549) 539
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