Lenovo 4220, 4222, 4215, 4219, 4221 manual Non-opticalmouse

To clean the 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 look at 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.

Non-optical mouse

The non-optical mouse uses a ball to navigate the pointer. If the pointer on the screen does not move smoothly with the mouse, you might need to clean the mouse.

To clean a non-optical mouse, do the following:

Note: The following illustration might be slightly different from your mouse.

1 Retainer ring 2 Ball

3 Plastic rollers 4 Ball cage

1.Turn off your computer.

2.Disconnect the mouse cable from the computer.

3.Turn the mouse upside down. Twist the retainer ring 1 to the unlocked position to remove the ball.

Chapter 7. Troubleshooting and diagnostics 67