Lenovo 0870A6U, User Manual

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2. Repeatedly press and release the F12 key when turning on the computer. When
the
Startup Device Menu opens, release the F12 key.
3.
Insert the diagnostic disc into the optical drive.
4. Select the optical drive with the diagnostic disc as the startup device and press
Enter. The diagnostic program opens.
5. Follow the instructions on the screen to run the desired diagnostic test. For
additional help, press the F1 key.
6. Remove the diagnostic disc from the optical drive after completing the
diagnostic test.
Cleaning an optical mouse
This section provides instructions on how to clean an optical mouse.
An optical mouse uses a LED and an optical sensor to navigate the pointer. If the
pointer on the screen does not move smoothly with the optical mouse, you might
need to clean the mouse.
To clean an optical mouse, do the following:
1. Turn off your computer.
2. Disconnect the mouse cable from the computer.
3. Turn the mouse upside down to view the lens.
a.
If there is a smudge on the lens, gently clean the area with a plain
cotton-tipped swab.
b. If there is debris in the lens, gently blow the debris away from the area.
4.
Check the surface on which you are using the mouse. If you have a very
intricate picture or pattern beneath the mouse, it may be difficult for the digital
signal processor (DSP) to determine changes in the mouse position.
5. Reconnect the mouse cable to the computer.
6. Turn your computer back on.
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User Guide