Skip to Content

Why Your Monitor Turns Off and on Repeatedly?

As an owner of a computer monitor, I know the frustration of having it turn off and on repeatedly without warning. After doing some research and testing, I am here to share how I solved the problem, as well as other solutions I discovered while trying to figure out why my monitor was misbehaving.

The most common culprit behind this issue is overheating. However, power settings and faulty wiring may also force your monitor to restart. 

Let’s take a look at some of the reasons why your monitor may be acting up.

Why Is Your Monitor Rebooting Repeatedly?

When your screen is turning off and on without any warning, there are a few errors that could be responsible.

So, let’s jump into some of the reasons behind the sudden reboots.

  1. Overheating

Most of the electrical components inside a monitor are incredibly temperature sensitive. That’s why the device has safety measures to prevent overheating.

One of these is a series of vents and fans that allow air to circulate through the monitor. This will ensure that the device stays cool throughout the day.

Although, over time, dust and other debris can build up and block these vents. When that happens, the heat won’t be able to escape, which will increase the internal temperature.

That may force the device into an automatic shutdown. Simply put, as the temperature of the screen increases, it’ll disconnect to avoid any damage.

Other than that, overheating can occur because of faulty capacitors. These are responsible for powering up the fans.

The components lose their ability to hold a charge as they age. So, they won’t be able to cool down your monitor while you use it.


Figuring out if overheating is the issue is quite simple. All you have to do is place your hands on the outer casing of the device.

If it’s warm to the touch, chances are there’s an issue with the cooling system.

At this point, the first step is to turn off your computer. Doing so will allow the device to rest up and come back down to room temperature.

Then, it’s time for a little cleaning. The easiest way to do that is by using a vacuum. Power on the sucker and use it to collect any dust or debris that may have built up.

After that, you can turn the monitor back on. If you still notice the temperature of the device is rising, the issue is most likely the capacitors.

In that case, the only solution is to replace the components. This may be a little tricky to do on your own, so it’s best to call in a professional.

  1. Inefficient Power Settings

When you first buy a monitor, the device will ask you for your preferences. This includes how bright you want the screen to be and how long it stays on.

These settings may be causing your device to turn off after a while of being idle.


To resolve this problem, you have to head to the Settings menu. Start by navigating to the Control Panel and finding the Hardware and Sounds tab.

There, you should see the icon for the Power Options. It’s usually a green battery with a cord. As soon as you click on the icon, it’ll give you three options:

  • Balanced mode
  • High-performance mode
  • Power-save mode

Ideally, the Balance mode is best for normal everyday use. This option will conserve power by turning off your screen periodically.

So, to make sure your monitor stays on, you’ll want to activate the High-performance mode.

You can also go into the advanced settings to set the screen timer. On the left-hand side of the Power Options page, there’s a Display Control tab.

This will allow you to choose how long you want your screen to stay on.

  1. Faulty Wiring

Another common cause of unexpected reboots is faulty wiring. Monitors rely on a constant supply of power in order to function properly.

They need the energy to operate the LCD screen and keep the cooling fans running. Therefore, if the monitor cables are loose or damaged, they may not be able to supply the device with power.


The first part of dealing with this issue is turning off your computer. After that, take some time to inspect the wires

Begin by securing all cables in the back of the monitor, including the power and HDMI cords. Then, follow the wiring and check for any signs of twisting or damage. 

It’s also a good idea to look at the pins that connect the wire to the monitor.

Once you make sure there are no loose or faulty cables, you can turn your computer back on. 

Wrapping Up

When you notice your monitor turns off and on repeatedly, there are a few factors to consider.

First off, make sure your screen isn’t overheating. If it is, then a thorough cleaning should do the trick.

Other than that, the issue could be inefficient power settings. For that, you’ll need to go into the Control Panel and change the pre-set defaults.

Finally, you’ll want to inspect the wiring of the monitor and make sure it gets enough power to operate.