LG monitor losing signal is a rather annoying problem, as it can happen in the middle of your gaming session, during a very important work call, or as you’re enjoying your favorite show.
While a lack of signal could indicate a computer monitor failing, other underlying issues could cause a black screen.
In this guide, we will focus on the most frequent monitor and computer issues that cause the monitor to lose signal.
Moreover, we will also discuss the best methods of solving the LG monitor no signal problem.
Why does your LG monitor have no signal?
As we’ve mentioned, a flickering or black screen can certainly signify a malfunctioning monitor.
However, other issues could be causing your external monitor to go black.
1. Monitor cable isn’t correctly connected
When it comes to cable connections, they should all fit tightly into their respective ports and inlets, and there should be no blockages compromising the connection.
A flickering LG monitor or a monitor that loses signal could be a clear sign of a loose monitor cable or a monitor cable that hasn’t been correctly connected.
It is also highly probable that the monitor cable is defective. For example, keeping your monitor too close to a wall can cause friction as you move it and seriously damage the cable.
2. Power cable is loose or damaged
It is essential to ensure that your LG monitor’s power cable is correctly plugged into the display port and that the connection is tight and secure.
Not only will the device be deprived of sufficient power to operate correctly if the power cord isn’t connected adequately, but it will also cause frequent signal interruptions on your computer or TV screen.
The power cord, like the monitor cable, could also be damaged somehow, which is another reason behind display issues, such as a lack of signal.
3. Graphics card isn’t correctly positioned
The graphics card’s position is crucial to your monitor’s overall functioning.
There is a designated slot for your graphics card on the motherboard, where the card should be positioned appropriately. If you haven’t installed it correctly, your LG monitor will continuously lose signal and go black.
It is also possible that the display cable is plugged into the motherboard instead of the graphics card – hence the signal interruptions.
4. Corrupted or outdated graphics drivers
The drivers may be corrupted and faulty if you’ve downloaded your graphics card drivers or updates from third-party websites.
What’s more, if your drivers come from a trusted source (the official LG website), they could be outdated – especially if you haven’t updated them in a long time.
5. The resolution isn’t correctly adjusted
If your LG monitor keeps losing signal and nothing seems to help, you probably haven’t set the resolution according to your monitor’s requirements and limits.
A display resolution higher than what your monitor can handle is bound to cause havoc on your display system, and you may not even be able to turn it on at some point.
Moreover, improper resolution settings may lead to screen flickering, freezing, and many other frustrating issues.
How to fix an LG monitor with no signal
We have focused on easy, beginner-friendly methods that can give quick and permanent results when fixing your LG monitor that loses signal.
However, remember that problems such as a failing monitor call for a visit to the nearest repair shop.
1. Inspect the cable connections
Since loose or damaged cable connections are the most common problems with the loss of signal in all monitors, we suggest starting the troubleshooting process by inspecting the monitor cable and the power cord.
The first step would be to turn off your LG monitor and unplug both cables from the monitor and the power source.
Inspect the cables for any signs of damage, as defective components should be replaced immediately to prevent an even bigger issue.
The next step would be to check all the inlets and ports for clogs and blockages. Take rubbing alcohol and a cotton swab and remove any signal blockages.
You also want to clean the cables if you notice accumulated dirt before reconnecting them.
Remember that you may not have connected the cables correctly in the first place, so ensure to insert each cable into its corresponding port.
Finally, make sure that the connections are tight and secure instead of loose.
2. Change the refresh rate
Changing the refresh rate can quickly solve all your monitor issues, and here’s how you can adjust it in a few simple steps.
Locate the battery icon on the bottom right corner of the toolbar, click on it, then navigate to More Power Options. Scroll down to the Choose When to turn OFF display option and ensure it is set to Never.
Save these changes, then go back to Desktop. Right-click the Desktop, then click on Screen Resolution.
In the settings menu, select Advanced Settings, then change the refresh rate from 72 Hz to 85 Hz and click OK to confirm.
3. Delete a corrupted display driver
To uninstall the corrupted display driver that is compromising the signal of your monitor, go to Settings on your computer, then launch Device Manager.
Navigate to the Display adapters option, click on it, and a list of all display drivers should appear. Find your graphics card driver, right-click on it and select Uninstall.
Click OK to complete the process, then restart your computer.
4. Update the display driver
An outdated driver is usually just as big of an issue as a corrupted one, so you want to ensure that you install the latest version available.
The first method of updating the display driver would be through the Settings on your computer. Select Update and Security, then Check for updates, and finally hit the Update button.
You should receive a notification that the Display driver has been updated if the installation was successful.
The second automatic update method would be to download Driver Easy and select Scan Now to let the tool locate any problematic drivers.
Using this tool, you can also find the available updates for your drivers online and let this software download and install them.
It is also possible to download and install the updates manually, and all you need is the model number of your LG monitor, which is usually located on the back of the device.
Remember to download these updates directly from the manufacturer’s website and never from sketchy websites.
5. Check the placement of the graphics card
If you suspect that the graphics card wasn’t correctly installed onto the motherboard, you will have to do a visual check, as there is no other way of finding out if this is the main issue causing the LG monitor to lose signal.
Turn off the computer, as well as the monitor. Open the monitor case and remove the motherboard. Also, take out the graphics card from the slot on the motherboard.
There might be some dust on the graphics card, so clean it thoroughly using a lint-free cloth.
Once the card is clean, re-insert it into the motherboard slot, ensuring that it fits snuggly.
Place the motherboard back into the monitor, close the case and turn on your PC and the LG monitor to check if the signal issue has been solved.