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LG C1 Flickering [Quick Fixes]

LG C1 Flickering

Unquestionably Unbeatable: LG OLEDs Set the Standard for Picture Quality, Color Accuracy, Computational Power, and Software. Their C1 model is designed keeping gaming in mind and has successfully stayed up to expectations.

However, the CX, C1, and C2 models (along with their higher-end G series counterparts) have issues with Screen flickering, especially while playing heavy-duty games.

Here are some potential causes of flickering on the LG C1:

  1. Misalignment of [G-Sync/Freesync] with the variable refresh rate (can be resolved by disabling VRR and enabling software VSync or alternative solutions).
  2. Pixel walk refers to the individual pixels behaving erratically (Check it out here).
  3. Slow screen refresh rate (can be addressed by selecting a higher refresh rate in the display settings).
  4. Loose power cable (ensure it is securely connected to the ports).
  5. Using multiple power cables in a single power extension.
  6. A worn-out display cable such as VGA, HDMI, DVI, or DP (consider purchasing a new cable).
  7. Loose or poorly fitted display cables.
  8. Issues with graphic card drivers.
  9. Internal power supply damage in the monitor (requires professional replacement at a lab).

It’s important to note that these factors can contribute to flickering, but troubleshooting and addressing each potential cause individually can help resolve the issue effectively.

Solution 1: Disable Variable Refresh Rate (VRR) and activate software Vertical Synchronization (Vsync)

The biggest reason for the flickering issue on the LG C1 is that the (G-Sync/Freesync) feature gets out of sync with the variable refresh rate.

G-SYNC® is a special technology made by Nvidia that replaces Vsync and helps eliminate screen tearing. It’s a paid technology. FreeSync, on the other hand, has the same purpose as G-Sync but doesn’t require any additional payment.

The C1 has a variable refresh rate (VRR) range of 40-120Hz. If you have turned on (G-Sync/Freesync) and your frames per second (fps) go beyond this range, you will notice the screen flickering.

The flickering happens because (G-Sync/Freesync) tries to sync with a refresh rate that it can’t handle due to the minimum VRR refresh rate set too high by LG.

But don’t worry; the fix is quite simple! All you need to do is turn off VRR (Variable Refresh Rate) and enable the software Vsync. Alternatively, you can make sure your fps stay above 80 all the time while keeping VRR on.

Follow these steps to turn off VRR:

  1. Using your LG C1 remote, press the Settings button. It’s usually represented by a gear icon.
  2. Navigate to the Picture submenu using the arrow buttons on your remote and select it.
  3. Scroll down until you see the Additional Settings option and select it.
  4. Look for the Variable Refresh Rate (VRR) option and switch it off.
  5. Confirm your selection and exit the menu.

If none of these solutions works, you can try lowering the graphics settings in your games to maintain a steady fps above 80. This should help prevent the flickering issue.

Solution 2: Display Calibration for Pixel Walk

Pixel walk, also known as pixel inversion, refers to the phenomenon where a display’s voltage fluctuates between positive and negative cycles, resulting in visual artefacts such as flickering.

This issue can be observed during various activities like gaming, video playback, and general usage.

To identify and address pixel inversion artefacts, it is recommended to perform a pixel walk test. This test enables the detection of blurred or flickering regions on the display.

Once you have confirmed the presence of this problem on your monitor, you can resolve it at no cost by visiting the Display Calibration and Characterization website. Follow the provided procedure by selecting your operating system to rectify the issue effectively.

Solution 3: Adjusting Monitor Refresh Rate

Did you know that monitors flicker all the time? It’s just that our eyes can’t perceive it when the refresh rate is high. That’s why when you try to take a picture of your screen, you may see moving black lines.

A monitor’s refresh rate refers to how many times it updates the display in one second. A properly functioning screen refreshes itself at a faster rate, making the flickering unnoticeable to the human eye.

If your graphics card doesn’t have G-Sync or if you’re using an older version of a gaming PC, simply increasing the refresh rate of your monitor might solve the problem. Here’s how you can do it

Step 1: Right-click on your desktop and select Display Settings

Step 2: Scroll Down to the end and select Advanced Display Settings

Step 3: Select Refresh Rate and Select a higher refresh rate (however, it is limited by the model; some have a higher refresh rate of up to 120 Hz while others are limited to 60 Hz).

You need to test each refresh rate, restart the computer and see if the flickering has stopped. If it doesn’t stop the flickering, try a higher one.

Solution 4: Addressing Power Supply Concerns

Just like monitors, electricity operates in cycles. In the United States, the standard frequency is 60 Hz per second, which is optimized for the seamless operation of appliances.

Therefore, it is important to examine your T-Power AC Adapter. If it is not functioning correctly or if the female end is worn out or damaged, it may fail to provide the required current. This can result in flickering issues with your LG C1.

If your power cable is in good condition, it is advisable to check your main electricity board. It typically includes a meter that displays the frequency of the electricity.

Alternatively, you can purchase a frequency meter to assess the frequency of your electricity if your board lacks this feature.

Another significant factor that can cause monitor flickering is having multiple devices plugged into the same power outlet. This can lead to electrical interference from other devices, which can disrupt the refresh rate frequency of your monitor.

To resolve this problem, unplug other devices from the outlet and ensure that they are powered by an extension cord placed at a distance from your monitor.

Solution 5: Check Input Cables

A flickering monitor can often be attributed to faulty HDMI, DisplayPort (DP), VGA, DVI, or display cables.

To address this issue, follow these steps:

  1. Begin by visually inspecting the display cables and their ports for any visible signs of damage. Look for frayed wires, bent pins, or loose connections.
  2. Carefully examine both ends of the cable and inspect the pins. If you notice a damaged pin or head, it could be the cause of the flickering. Additionally, ensure that the cables are securely connected at both ends. If there is a loose connection, make sure it is snugly fitted.
  3. If the screen continues to flicker, try using a different port and cable. For example, you can replace the DisplayPort (DP) cable with an HDMI cable or vice versa. This can help determine if the issue lies with a specific port or cable.

By thoroughly examining and, if necessary, replacing the input cables, you can troubleshoot and potentially resolve the flickering problem with your monitor.

Solution 6: Update Graphics Card Drivers and Check for External Device Interference

Flickering on the monitor screen can be caused by outdated or faulty graphics card drivers. It is essential to ensure that your drivers are fully installed, functional, and up to date.

Here’s how you can check and update your graphic card drivers:

  1. Open the Control Panel on your computer.
  2. Select “Display Adapters” from the available options.
  3. Choose your specific Graphics Card from the list.
  4. Click on the “Drivers” tab or section to check the status of your drivers.

Verify if the drivers are functioning correctly and if they are up to date. If updates are available, you can choose to automatically or manually update the graphic card drivers. If you have previously saved drivers on your computer, you can utilize those for the update process.

In some instances, Windows 10 may experience connectivity issues with the display due to a bug. If you encounter such a situation, simply press the Windows key + Ctrl + Shift + B on your keyboard to restart the video driver.

It’s also worth noting that certain accessories, such as USB devices, speakers, and printers, can interfere with the monitor screen, leading to flickering issues. To troubleshoot this, try disconnecting these devices temporarily and observe if the flickering persists.

By updating your graphics card drivers and addressing potential external device interference, you can effectively tackle monitor screen flickering and enhance your overall viewing experience.


  1. The most common cause of LG C1 flickering is the (G-Sync/Freesync) falls out of alignment from the variable refresh rate; all you need to do is to turn off VRR.
  2. Another cause of flickering is pixel walk; I think it is a firmware-fixable issue, but unfortunately, we’re all at LG’s mercy to issue a firmware fix.
  3. A slow screen refresh rate needs changes in display settings, and you must select a higher refresh rate until the flickering stops.
  4. On the other hand, a loose or damaged display cable may be the only issue. The display cable must be connected securely and should be undamaged.

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