Computer peripheral devices play the role of transmission, transfer and storage of data and information, and are an important part of computer systems. The normal use of a computer is inseparable from peripheral devices such as mouse, keyboard, monitor, etc., but all equipment and machinery have a certain service life, and they are prone to failure after a long time of use. What should I do if the computer peripherals fail? The following introduces you to the common fault solutions of computer peripherals.
Mouse failure
Mouse failure
Wired mouse failure: whether the USB interface is faulty; whether the mouse is damaged; whether the mouse is in poor contact; whether the driver is abnormal.
Wireless mouse failure: 2.4GHz wireless mouse failure First check the switch and battery of the mouse. The Bluetooth wireless mouse fails Check whether the computer has and turns on the Bluetooth function, and then reinstall the driver.
The mouse cannot drag the file
Check whether the mouse is locked, and whether there are settings for automatic arrangement or alignment to the network. Open the shortcut bar of the right mouse button to set.
The right mouse button fails, the left mouse button fails, the mouse click becomes double-click, the mouse card makes a sound, the computer is black and only the mouse can move, and the mouse cannot be recognized>>
Keyboard failure
The keys on the keyboard are disordered
1. Press F8 when the machine is turned on, and the advanced options appear in the release. Select “Last Correct Configuration” and press Enter to fix it. 2. If the fault persists, please use the system restore that comes with the system, and restore it to the time when you did not have the fault.
The numeric keypad fails
1. You can see if the Numlock key is turned on, there is a numeric keypad light on it, press the Numlock key and the light above it will turn on the numeric keypad. 2. If only the keypad is locked, press and hold the fn+Numlk keys at the same time to switch, and vice versa.
Some keys fail
In most cases, the internal circuit board of the computer keyboard is faulty. This phenomenon is generally caused by dirt on the circuit board or conductive plastic, which makes the two cannot be connected normally.
The keyboard is not typing the information we want, the interface of the keyboard is broken, the dust of the keyboard is cleaned>>
The display failure
The display screen flickers
1. Check whether the VGA cable is plugged in tightly, or whether there are broken pins. 2. If it is a problem with the graphics card, reinstall the graphics card driver.
Screen bright line or dark line
The bright line fault is generally a problem with the cable connecting the LCD screen body, and the dark line is generally the screen body has leakage. The above two problems are basically There is no maintenance value.
The screen is blurry or white
Generally, there is a problem with the driving voltage of the screen. If the driving circuit of the screen is on the main board, it should be the fault of the main board. If the driving circuit of the screen is faulty On the LCD screen, the screen should be replaced under normal circumstances.
The screen is flickering and the color is blurred, the monitor is out of power, and the monitor is off when it lights up, but the power indicator is always on>>
U disk failure
File or directory Corrupted and unreadable
Enter “My Computer”, right-click on the USB drive letter, select “Properties”, select “Tools” in the pop-up properties panel, click “Check Now”, ” Start”, check and repair the USB drive.
The computer does not recognize the USB flash drive
1. Right-click the “Computer” icon, and then click “Manage”; 2. In the “Computer Management Window”, click “Storage” The triangle on the left, click “Disk Management” in the drop-down list that appears; 3. Right-click the undisplayed U disk letter, and select “Change Drive and Road King” in the menu; 4. Click “Change” in the dialog box “; re-select an unused drive letter and click “OK”.
Cancel the password protection of U disk
1. Insert the U disk into the computer, then enter the control panel of the computer, find “bitlocker drive encryption”, if it is not found, in the upper right corner Change the view mode to “large icon”; 2. Click “bitlocker drive encryption”, after entering the new window, click “close bitlocker” after the U disk letter; 3. In the pop-up dialog box, select “decrypt drive”, Wait for decryption to complete.
The files are deleted after the U disk is disinfected, the U disk needs to be formatted when it is used, the files in the U disk cannot be copied, and the files in the U disk are hidden>>
The mobile hard disk is faulty
Error checking the hard disk at startup
Check whether the hard disk cable is loose; try another good hard disk cable. Try changing the hard disk to another machine, and change a motherboard — confirm that the IDE port is no problem. It may also be a problem caused by the power supply, and replace it with a better quality power supply. Carefully check the PCB of the hard disk. If the PCB board has burnt marks, please send it for repair as soon as possible.
The sound determines the hard disk failure
The sound is: “da…da…da…” and then calm down, the hard disk probably has no problem; the sound is “da…da…da… …”, and then a “click…click” sound several times in a row, there is a high possibility that there is a problem with the hard disk. If the sound is a periodic noise like “Da, Da, Da”, it indicates that there is a problem with the mechanical control part of the hard disk or the transmission arm, or the platter is seriously damaged.
Hard disk fault tolerance prompts, BIOS settings and installation problems, hard disk failures judged by sound, hard disk errors after overclocking>>
Camera failure
Computer camera cannot be turned on
1. Right-click My Computer→Manage→Device Manager to check if the camera is turned off. 2. Whether the connection between the computer and the camera is in good contact, you can re-plug and unplug to see if it is normal. 3. Take a USB port camera and plug it into the computer for an interview. If the external camera can be used, then it is 100% that the notebook camera is damaged. 4. Reinstall the camera driver.
A white or black screen appears after the image frame is popped up
Please refer to the precautions in the manual to change the settings. It may be that the “Preview” under the “Option” menu in the camera software is not opened, please double-click and wait for five to ten seconds.
The computer cannot detect the camera, the preview speed of the camera is too slow, the video preview image of the camera is too bright or too dark, the camera has a color deviation>>
The tablet is faulty
not normal Display the written text
1. First, check whether the Word or web page is selected, and check whether the title bar is gray. If it is gray, it means that the text window of the handwriting board is selected at this time. Click the mouse to switch Come and use it normally.
2. Check the state of the system’s own input method at this time. If the input method is in English at this time, the tablet cannot be used normally. At this time, choose a Chinese input method, Wubi or Smart ABC Other Chinese input methods are available.
3. In the control panel, find the icon of the tablet you are using, double-click to open a stress test window, and use the stylus again to position the tablet according to the prompts in the test window. The basic order is upper left, lower left , the lower right, the upper right four points, after repositioning, click OK.
4. If you cannot locate or do not respond during this step, you need to reinstall the tablet driver.
UPS uninterruptible power supply failure
UPS output failure
The UPS output is normal when there is utility power, but when there is no utility power, the buzzer beeps for a long time and there is no output.
1. Check the battery voltage to see if the battery is undercharged. Check whether the battery itself is faulty or the charging circuit is faulty.
2. Check whether the drive circuit of the inverter works normally. If the output of the drive circuit is normal, the inverter is damaged.
3. Check whether the waveform generation circuit has PWM control signal output. If there is control signal output, it means that the fault is in the inverter drive circuit.
4. If the waveform generation circuit has no PWM control signal output, check whether its output is blocked due to the operation of the protection circuit, and if so, find out the reason for the protection; if the protection circuit does not work and the working voltage is normal, and If the waveform generating circuit has no PWM waveform output, it means that the waveform generating circuit is damaged.
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