You are cleaning a laptop computer. You plan to use compressed air where appropriate.
For which of the following is compressed air the recommended cleaning method for the device? (Select THREE.)
1. DVD drive
2. External case
3. >>Keyboard-->Correct
4. LCD screen
5. >>USB port-->Correct
6. Touchpad
7. >>Fans -->Correct
Explanation : You can use compressed air to clean the keyboard, fans, and USB port. You can also use compressed air to clean other external ports. When cleaning fans, you should use a toothpick or similar object to prevent the fan blades from spinning. Allowing the blades to overspin (spin too fast) can damage the fans.
You should not use compressed air to clean the external case, LCD screen, DVD drive, or touchpad. You should use a soft, water-dampened cloth to clean the external case and touchpad.
Use a soft, dry cloth, screen cleaning pads, or cleansers designed for cleaning screens to clean the LCD screen.
Use a commercial video cleaning kit to clean the DVD drive. Spraying compressed air in a DVD drive does not clean the laser unless directed on the lens and can force dust into delicate mechanical components, causing the drive to fail. However, if you can reach the lens of the laser with an extension wand and spray that area directly, some manufacturers recommend this as a possible cleaning method. Because of the potential problems it can cause, it is general discouraged in service manuals.
Objective: Laptops and Portable Devices
