If this does not correct the TrackPoint problem, continue
with the following.
After you use the TrackPoint, 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
TrackPoint pointer. This symptom is not a hardware
problem. No service actions are necessary if the pointer
movement stops ina short period of time.
If a click button problem or pointing stick problem occurs,
do the following:
1. Boot from the diagnostics diskette and start the PQA
program (please refer to “PQA System Diagnostics”
on page 42).
2. Go to Pointing Dev. in the test items.
3. Press F2 in the test items.
4. Follow the instructions in the message window.
If either the pointing stick or the click button does not work,
do the following actions one a time to correct the problem.
Do not replace a non-defective FRU.
1. Reseat the keyboard cables.
2. Replace the keyboard.
3. Replace the planar board.
Power Management Features
Three power management modes are available in the com-
puter system to reduce power consumption and to prolong
battery life.
Standby Mode:
In standby mode, the following
occurs:
The LCD backlight turns off.
The hard disk drive motor stops.
The audio amplifier turns off. (Fn+F3)
Events that cause the computer to enter standby mode:
Standby mode requested by the Fn key (Fn+F3).
The computer exits standby and resumes operation when
any key is pressed.
Suspend Mode:
In suspend mode, the following
occurs:
The LCD is powered off.
The hard disk drive is powered off.
The CPU stops.
Events that cause the computer to enter suspend mode:
Suspend mode requested by the Fn key (Fn+F4).
The Lid is closed.
ThinkPad 390/i Series 1700
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