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Testing the touchpad
If the touchpad doesn’t work, do the following actions one at a time to correct the problem.
To test the touchpad:
1 Reconnect the touchpad cables.
2 Replace the touchpad.
3 Replace the system board.
After you use the touchpad, the pointer may drift 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.
Power-On Self-Test (POST) error message
The POST error message index lists the error message and their possible causes. The most
likely cause is listed first.
This index can also help you determine the next possible FRU to be replaced when
servicing a notebook.
If the symptom is not listed, see “Undetermined problems” on page 155.
The following lists the error messages that the BIOS displays on the screen and the error
symptoms classified by function.
Important
Do not replace a non-defective FRU.
Important
Perform the FRU replacement or actions in the sequence shown in the FRU/Action
column. If the FRU replacement does not solve the problem, put the original part back in
the notebook. Do not replace a non-defective FRU.
Important
Most of the error messages occur during POST. Some of them display information
about a hardware device, such as the amount of memory installed. Others may indicate a
problem with a device, such as the way it has been configured.
Important
If the system fails after you make changes in the BIOS Setup Utility menus, reset
the notebook, enter Setup, and install Setup defaults or correct the error.