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How to Fix Computer Monitor Display Problems?

fix computer monitor display problem
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Are you having any display issues on your computer monitor? Here are some common problems with monitor. It might be a CRT monitor, LCD or LED. Follow these instructions to fix monitor display?

  1. There is no display on the monitor

Problem: There is no display at all in the monitor, not even any error message. This usually is a problem with physical connection, problems with power or data cable. If the below steps didn’t work, you may have to replace monitor or take it for tech shop repair.

Solution:

  • Make sure the monitor is connected to a power source and the monitor power button is turned on. This might sound silly. From my experience as a tech support, I was surprised by the number of users who made mistake by not doing the basic step. Basically, make sure the monitor LED is turned on when troubleshooting.
    If there is no power coming, you may have to check the power cable. Make sure it is physically connected properly. You can also check if the cable is working properly by temporarily using a cable from another monitor.
  • Problems with RAM, processor or motherboard can also cause no display from monitor. RAM problems are usually followed by beep sounds. For other issues, the best way is to connect to another computer and check if it is working.
  • If you have multiple monitors connected for dual screen display, configure it for single monitor display. Check both monitors are working. Also check if the hardware is connected properly.
  • Check to ensure that the video cable is connected to video output on your PC and the input on your monitor. Gently wiggle the cord to see if the plugs are secure.
  • If none of the above worked, connect a working monitor to get a final confirmation.
  1. Flickering of monitor and video dropping out occasionally

Problem: Flickering monitor is a common problem in screens. If not corrected soon, it is a major health problem as it creates eye problems, headache, exhaustion from stress etc.

Solution:

  • Generally, flicker and dropouts are result of a bad (or poorly connected) video cable running between your PC and monitor. Try unplugging and firmly reattaching the cable to the video input and outputs.
  • Flicker can also result from a change to the monitor’s refresh rate, which is the number of times per second the monitor redraws the screen. (The accidental change most often occurs when you update video drivers.)
  • To reduce flicker on your monitor, try to increase the Refresh Rate in Windows.
  • In Win7 and Win8, right-click an open area of your Desktop, select Screen Resolution, and click Advanced Settings. Next, select the Monitor tab and select a different rate from the Screen Refresh Rate drop-down window. Click Apply and try out the new refresh rate
  • In Windows 10, right-click open area in Desktop, select Display settings, select Advanced display settings, select Display Adapter properties. Click Monitor tab, select the refresh rate that suits your monitor.
  1. Video light is too dark or bright

Problem: Video is too dark or bright on the monitor. A major cause of this problem is someone toggling around the settings and change optimum settings.

Solution:

  • Some monitors feature Brightness or Contrast buttons that could be easily (mis)adjusted while moving or cleaning the monitor. Fortunately, most monitors feature a Default Settings or Factory Reset function you can use to restore the display settings.
  • Some monitors feature an OSD (onscreen display) that will let you adjust the visual properties through a menu system with sliders for each adjustable option.
  • If you’ve cranked the Brightness and Contrast controls and the screen still seems dark, you may need to take the monitor in for repairs.
  • LCD backlights can sometimes fade or malfunction, which would result in the dim display. (Get an estimate; it may be smarter to simply replace the display, depending on the cost of the repair.)
  1. Images on the screen does not match the screen size

Problem: It’s sometimes possible to choose a resolution that’s not compatible with your monitor. For instance, if you select the 1600 x 1200 resolution and the monitor can only handle a resolution of 1280 x 1024, the display may only show part of your Desktop—requiring you to move your mouse to view other portions.

Solution:

  • Check your monitor’s documentation to see the maximum resolution you can use.
  • To change resolution in Windows 7 and Windows 8, right-click an open area of your Desktop and select Screen Resolution. From the drop-down list, select a resolution that matches the native resolution of your monitor. Click Accept; you’ll have 15 seconds to approve the change by clicking the Keep Changes button.
  • In Windows 10, right-click open area in Desktop, select Display settings, select Advanced display settings, select the Resolution.
  1. Fix Stuck Pixel or Dead Pixel on monitor

Problem: This usually happens in LCD/ LED monitor. You might see a point on the monitor which looks stuck. The spot is either too bright or too dark. This is a dead pixel. If that spot show some color, it might be a stuck pixel. These problems are potentially solvable. In case if it didn’t work out, you might need to get it repaired or replaced by the manufacturer.

Solution:

  • Turn on the monitor. Use a dark or white background on the screen to highlight the spot. Use a narrow ended objected such as a pen, pencil with rounded edges. Use the rounded edge to press on the dead/stuck pixel. You can also use a clean micro-fiber or paper towel to press on the problem area. Don’t press it too hard, just hard enough to find a white glow on the point of contact. Tap it a little harder every time. By 10-15 taps, the pixel should get corrected itself.
  • There is a device called PixelTuneup which can be used to improve picture quality, colour and contrast by tuning up and fixing pixel problems. This device can be connected to televisions, LCD, LED, Plasma or CRT. This device can be used to fix dead or stuck pixels.
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About the author: Anup Raman A Tech Enthusiast|Blogger|Tech Trainer with 10+ yrs experience in the field of IT. My expertise are in Operating Systems, mainly Windows and Computer security which comes from my experience, working as Tech Support and Trainer for Microsoft, Symantec and McAfee. Loves blogging about Technical Troubleshooting, discussing latest Gadgets, Games and doing Reviews.

{ 12 comments… add one }
  • Dev Apr 8, 2017, 3:53 pm

    On the lower right of my monitor there’s a black patch and there is blue, yellow and red around the batch, there are also some light leaks around it… and above the light leak is a red streak that touches till the top of the screen and then fades away… please help!

    • Anup Raman Apr 9, 2017, 4:17 am

      Is this a LCD/LED or CRT monitor?

      For a CRT monitor, this is a classic problem when the picture tube or it’s related electronic circuit gets damaged. Replacing the damaged parts should fix it. However CRT monitors are out of market now.

      In case of LCD/LED, Try these steps.

      1)check the troubleshooting (Step 5) recommended for Fix stuck Pixel.
      2)check the monitor on another computer to confirm if it is a graphics problem or monitor problem.
      3)check graphics card properties and load default settings.

      If none worked, check with monitor repair.

  • juanito t. cajuelan Mar 26, 2017, 1:14 am

    There are two dark black spot , thumb size seen at the right side of the monitor. Can we fix this ?

    • Anup Raman Mar 26, 2017, 4:58 am

      Check the section under Fix Stuck Pixel or Dead Pixel on monitor. I just added the section. Hope that fix the problem.

  • tasos Mar 15, 2017, 11:22 am

    in dark scenes is like something is behind (more like previous brighter scenes)
    can you help me ?

    • Anup Raman Mar 15, 2017, 1:45 pm

      Is that a LCD/LED monitor or CRT monitor? In CRT monitors, this can happen from picture tube problems. Also check the refresh rate. It should be minimum 60Hz on older screens, but with the latest screens it is much more. Check the instructions manual for more details. Also check if you have the option to load default settings for monitor. If yes, load default settings and check if that fix the problem.

  • mansi tripathi Mar 10, 2017, 5:46 am

    my monitor has a problem of 3 lines in a display how to remove it

    • Anup Raman Mar 10, 2017, 5:54 am

      Hi Mansi,

      Here are the possible causes

      1) Cable is not connected properly at the ports – Make sure it is connected properly at both ends.
      2) Faulty cable – The cable which connects between monitor and seat. Try a new cable or connect a properly working cable from another computer and check if the problem is gone.
      3) Electrical interference from other power cable located near the monitor.
      4) If non of this worked, this must be a faulty monitor. You need to get it replaced.

      Hope this helps.

  • phil Nov 15, 2016, 1:29 pm

    my monitor works but has a blue square roughly 4 x 2 inches with symbols showing half sun . speaker with volume red/blue/green circles hammer and spanner an atlas and a man stood in an open door. this obstructs my view

    • Anup Raman Nov 15, 2016, 4:42 pm

      I believe you may have the monitor menu turned on accidentally.
      Press the button which opens indicate menu on the monitor. It works like a turn on/off monitor.So press it once, the menu should be gone.

  • Marcus Oct 14, 2016, 10:16 am

    How do I correct the display? Pictures and videos are outlined in 3 colours. Many thanks.

    • Anup Raman Oct 14, 2016, 10:28 am

      Try troubleshooting in the following order

      1) Check for loosely connected wires and contacts between monitor and PC. Connect it properly.
      2) This may be a problem with video card. Check for problems in Video card.First check if the device drivers are installed properly for the video card and if it is an updated one. It also helps to uninstall and reinstall video card drivers.
      If that doesnt work, check if you have 2 video cards – an external and internal video card. Maybe one of the video card is not working properly.If you have 2 video cards, disable one at a time and check if that gets the problem fixed.
      If the video card is corrupted, you may have to buy a new one.
      3) Try connecting your monitor to another computer or connect another monitor to your computer. This will help you find out if it is a monitor problem. Buy a new one.

      Hope this helps. Let me know the status.

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