Lenovo ThinkPad 390X Hardware Maintenance Manual (November 1999): ThinkPad 390 - Page 40
TrackPoint Checkout
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TrackPoint Checkout If the external mouse is connected, the TrackPoint does not work. In this case, please detach the external mouse to check the TrackPoint. 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 and start PC-Doctor DOS. (See "PC-Doctor DOS System Diagnostics" on page 48 for details.) 2. Select Interactive Tests. 3. Select Mouse. 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 system board. 34 ThinkPad 390X / i 1700 HMM
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