Cleaning The Cover Of Your Computer; Cleaning Your Computer Keyboard; Cleaning Your Computer Display - Lenovo ThinkPad T400 Service And Troubleshooting Manual

v Using or touching the reader with a dirty finger.
If you notice any of the following conditions, gently clean the surface of the
reader with a dry, soft, lint-free cloth:
v The surface of the reader is dirty or stained.
v The surface of the reader is wet.
v The reader often fails to enroll or authenticate your fingerprint.

Cleaning the cover of your computer

Occasionally clean your computer as follows:
1. Prepare a mixture of a gentle kitchen-use detergent (one that does not
2. Absorb the diluted detergent into a sponge.
3. Squeeze excess liquid from the sponge.
4. Wipe the cover with the sponge, using a circular motion and taking care
5. Wipe the surface to remove the detergent.
6. Rinse the sponge with clean running water.
7. Wipe the cover with the clean sponge.
8. Wipe the surface again with a dry, soft lint-free cloth.
9. Wait for the surface to dry completely and remove any cloth fibers from

Cleaning your computer keyboard

1. Absorb some isopropyl rubbing alcohol on a soft, dust-free cloth.
2. Wipe each keytop surface with the cloth. Wipe the keys one by one; if you
3. Allow to dry.
4. To remove any crumbs and dust from beneath the keys, you can use a

Cleaning your computer display

1. Gently wipe the display with a dry, soft lint-free cloth. If you see a
2. Wipe or dust the stain gently with a soft, dry cloth.
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ThinkPad T400 and R400 Service and Troubleshooting Guide
contain abrasive powder or strong chemicals such as acid or alkaline). Use
5 parts water to 1 part detergent.
not to let any excess liquid drip.
the computer surface.
wipe several keys at a time, the cloth may hook onto an adjacent key and
possibly damage it. Make sure that no liquid drips onto or between the
keys.
camera blower with a brush or cool air from a hair drier.
Note: Avoid spraying cleaner directly on the display or the keyboard.
scratch-like mark on your display, it might be a stain transferred from the
keyboard or the TrackPoint
from the outside.
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pointing stick when the cover was pressed