Computer monitors is simple, you plug it in and turn it on. But you never know what is going on inside that blank plastic case. But when you are not specially known to fix monitors, it is usually best to return to the manufacturer if you still have warranty. If not, you have to buy a new monitor. Before you buy a new monitor, try some of these solutions for the issue/problem you are facing and see if that solves the issues/problem.
1. Stuttering or Flickering
Stuttering - It might be a loose or faulty cable. So first, tighten down the cable on both end (make sure to completely tighten any retention screws, if your cable have them) or you can replace the cable with a new one. The same thing goes for the power cable, make sure it is secured at both ends. If the problem occurs again, replace the cable if possible.
Flickering - An incorrect refresh rate settings can cause flickering. Refresh rate is the number of times the computer sends an image to the monitor per second (also known as hertz). Go into your monitor display settings (right-click desktop and head to Display settings > Display adapter properties > Monitor in Windows 10) to make sure the right hertz is applied - you may need to update your video drivers.
But most flickering are caused by a power deficiency somewhere in the monitor itself. It is possible that you could be drawing too much power from one of your home's electrical circuits or overloading your surge protector.
2. Vertical lines
Black or single-colored lines on LCD screen are caused by many different issues, but if the standard fixes outlined the flickering section, don't fix them (check your video and power cables for problems, install new drivers), it is probably a physical defect in the screen itself. You can try your monitor on another computer or laptop to see if the problem occurs. If it does, you probably have to look for a replacement since the error is almost certainly in the LCD.
3. Dead or Stuck pixels
A "dead" pixel is a single dot on your LCD screen that doesn't illuminate, showing up as one or more black squares. There isn't much you can do about dead pixels (it is a physical malfunction of the screen panel.) One or two dead pixels doesn't mean you have to throw the monitor away but it is possible to work around it or ignore it. You can also look into a warranty replacement even though many manufacturers won't replace a screen until multiple pixels have gone out.
"Stuck" pixels are similar, instead of showing black, they are stuck on a single color that doesn't match the computer screen's image. A stuck pixel may be a different matter. Depending on how the problem is manifesting. It might be possible to get the pixels back to working order.
There is a few ways you can try:
Wait - Some stuck pixels will unstuck themselves after a period of time. This can take hours, days, weeks or even years.
Use software - There are some software programs that rapidly change colors, cycling through a variety of colors on your screen. If a color-cycling window is placed in the area of the stuck pixel, the program is constantly asking the stuck pixel to change color.
4. Buzzing
This issue can cause a buzz or whine noise in the monitor is usually the back-light, compact florescent is usually used for lighting in older models. Buzzing can occur due to problems in power regulation to one or more bulbs. You can try adjusting the brightness of your screen up or down to see if the noise disappear.
5. Incorrect Resolution
If your screen shows the wrong resolution for your desktop, it is most likely your graphics card. It is possible that either the software component (the graphics driver) or the graphics card itself is where the problem is located. You can try updating the driver and see if it fixes the problem.
If the problem occur even you are testing the monitor on another machine, there might be something wrong with the internal electronics. You can try alternative input (HDMI/Display-Port/DVI) if possible,
6. Random Shutoffs
A monitor that sometimes shutoff itself is usually that it is not getting sufficient power from the outlet or surge protector. Check your home's circuit breaker and make sure the power cable is correctly plugged in. It is also possible that the internal or external power converter is overheating. Carefully check the casing of the monitor itself or the power adapter, if it is too hot to touch for more than a few seconds, it needs to be replaced.
Conclusion
Always check your monitor if there's any issues, you might not know what is behind that blank screen in the monitor. You can always check for common issues that is most occurred.
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