There is no display on the monitor
Problem: There is no display at all in the monitor, not even an error message. This usually is a problem with the 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.
- 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 the 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 the 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.
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.
- Generally, flicker and dropouts are a 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 the 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.
Checklist before buying a used Monitor
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.
- 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.)
Images on the screen do 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.
- Check your monitor’s documentation to see the maximum resolution you can use.
- To change the 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 an open area in Desktop, select Display settings, select Advanced display settings, select the Resolution.
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 shows 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.
- 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 microfiber 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.