The mouse

The mouse

1.Clean the mouse-if the mouse is not working properly, the problem could be the accumulation of dirt and dust from everyday use. The ball on the mechanical mouse can be removed for cleaning.(note: optical mice do not contain small rubber balls.) the process consists of sliding or turning the disc that holds the mouse ball inside the mouse. The mouse ball will drop out when the mouse is turned right side up. There are three rollers inside the mouse ball cavity. It is important to remove all lint off of the rollers. That will allow the mouse pointer to move more freely.

2.Mouse pointer movement- if the computer mouse is not responding correctly, make sure that it is on a flat surface and that the mouse rollers are clean. Another suggestion is to make sure that the mouse is plugged correctly into the mouse port on the back of the computer.

The keyboard

1.Constant beeping or clicking- not every beep signifies a problem,but if the computer is constantly beeping as it starts up, there may be a stuck key on the keyboard.

2.Number pad on the keyboard-if nothing happens when you press the number keys on the number pad (usually located on the right side of the keyboard), press the num lock key. If a small light (usually green) is lit, the num lock key is activated and the number keys on the number pad will work.

3.Sticky keys on the keyboard- when food or beverages are spilled on the keyboard, it can cause keys to stick. You can use compressed air made for cleaning keyboards. Office supply stores sell this "canned air," which contains a small straw for spraying into keyboard crevices.

Troubleshooting output devices

The monitor

1.            Computer is on but the screen is blank-assuming that you have checked the screen controls (i.e.,the brightness and contrast controls) and made sure that the monitor cable is properly connected to the system unit, the problem could be the video card or the monitor. If you have another monitor, substitute the faulty one with one that is known to be working. If the new one works, it means your original monitor is dead. If the new monitor does not work, then it means the video card in the system unit is probably faulty and needs to be replaced.

2.            The screen is completely black-if the computer screen is completely black, there are a couple possible solutions:

Check that the monitor cable is connected to the correct port on the back of the system unit and that the power cord is plugged into an electrical outlet.

Check the brightaness setting of the computer. If it is on zero or on a low brightness setting, change the setting to a brighter setting.

3.            Monitor image is resized- if the image on the computer monitor does not fill most of the screen, then the vertical or horizontal controls probably need to be adjusted. Use the controls on the monitor to do this . start by finding the menu button. One of the options in the menu should be horizontal placement and anthor should be vertical placement (usually by pressing the menu button repeatedly, you can access the different options). Adjust the setting, as necessary adjustments and the output does not change, then the monitor needs to be repaired or replaced.