The process for changing the refresh rate of your monitor depends on your operating system and the graphics card you are using. Here are some general steps you can follow:

1. Right-click on your desktop and select "Display settings" (on Windows) or "System Preferences" > "Displays" (on macOS).
2. In the Display settings, select the monitor you want to adjust (if you have more than one connected).
3. Look for an option called "Advanced display settings" (on Windows) or "Display" > "Advanced" (on macOS).
4. In the advanced settings, you should see an option to change the refresh rate. The available options will depend on your monitor and graphics card. Typically, you can choose from 60Hz, 75Hz, 120Hz, or higher.
5. Select the desired refresh rate and click "Apply" or "OK" to save the changes.

To enable 120Hz on your PS5, follow these steps:

1. Connect your PS5 to your monitor using an HDMI 2.1 cable. This cable is required for 120Hz output.
2. On your PS5, go to "Settings" > "Screen and Video" > "Video Output" > "Resolution".
3. Select "Automatic" for the resolution.
4. Scroll down and select "Enable 120Hz Output".
5. If your monitor supports Variable Refresh Rate (VRR), you can also enable this feature in the "Screen and Video" settings.
6. Once you have enabled 120Hz output, you should see smoother and more responsive gameplay in games that support it.

*Note that not all PS5 games support 120Hz output, and some may require additional settings adjustments within the game itself. Additionally, some games may not support 120Hz output at all, so be sure to check the game's specifications before enabling this feature.*

There are several reasons why your monitor may not be showing video. Here are some steps you can take to troubleshoot the issue:

1. Check the connections: Make sure the monitor's power cable is plugged in and the video cable is properly connected to both the monitor and your computer or other video source. Try unplugging and re-plugging the cables to ensure a secure connection.

• Check the power: Make sure the monitor is turned on and the power light is illuminated. If the monitor has a separate power button, press it to turn it on.

1. Check the input source: Make sure the monitor is set to the correct input source. Most monitors have multiple input options, such as HDMI or VGA, so ensure you have selected the right one that matches the port you plugged in the cable.
2. Restart the computer: Try restarting your computer or video source. This may help reset the connection between the computer and the monitor.
3. Check the monitor's settings: If the monitor has a built-in menu, check the settings to make sure nothing is turned off or muted that could be affecting the video display.
4. Try another monitor: If possible, try connecting your computer to another monitor to see if the issue is with the monitor or the computer.

*If none of these steps work, there may be a hardware problem with either the monitor or the computer, and it may be necessary to seek further assistance from a technician or contact the manufacturer for support.*

Screen flickering can be caused by a variety of issues, including hardware problems, outdated drivers, or software conflicts. Here are some steps you can take to fix screen flickering:

1. Update your graphics driver: If you have an outdated or corrupted graphics driver, it can cause screen flickering. Visit the manufacturer's website to download and install the latest driver for your graphics card.
2. Adjust screen resolution and refresh rate: Sometimes, the screen flickering issue can be resolved by adjusting the screen resolution and refresh rate. In Windows 10, right-click on the desktop and select "Display Settings". From there, you can adjust the resolution and refresh rate.
3. Disable hardware acceleration: Some programs, such as web browsers, use hardware acceleration to improve performance. However, this can also cause screen flickering. To disable hardware acceleration, go to the program's settings and look for the option to disable it.
4. Uninstall incompatible programs: Certain programs may conflict with your display driver and cause screen flickering. Try uninstalling recently installed programs to see if it resolves the issue.
5. Check the cables: Ensure that the cables connecting your computer or other video source to your monitor are properly connected and not damaged.
6. Check for electrical interference: Sometimes, electrical interference from other devices can cause screen flickering. Try moving other electronic devices away from your monitor to see if it helps.
7. Contact the manufacturer: If none of these steps work, there may be a hardware issue with your monitor. Contact the manufacturer or a technician for further assistance.

To enable G-Sync or AMD FreeSync, you need to make sure that your monitor and graphics card support the technology. Here are the steps to enable G-Sync or AMD FreeSync:

Enabling G-Sync:

1. Make sure your NVIDIA graphics card and monitor support G-Sync.
2. Connect your monitor to your graphics card using a DisplayPort cable.
3. Enable G-Sync in the NVIDIA Control Panel. Right-click on the desktop and select "NVIDIA Control Panel". Under "Display", select "Set up G-Sync". Check the box next to "Enable G-Sync" and select your monitor from the list of compatible displays.
4. Enable G-Sync in-game by selecting "Full Screen" mode in the game's settings.

Enabling AMD FreeSync:

1. Make sure your AMD graphics card and monitor support FreeSync.
2. Connect your monitor to your graphics card using a DisplayPort cable or HDMI cable.
3. Enable FreeSync in the AMD Radeon Settings. Right-click on the desktop and select "AMD Radeon Settings". Select "Display" and enable "AMD FreeSync".
4. Enable FreeSync in-game by selecting "Full Screen" mode in the game's settings.

To update your graphics card driver, follow these steps:

1. Determine your graphics card model: Go to "Device Manager" (search for it in the Windows search bar) and expand the "Display adapters" section. Your graphics card model should be listed there.
2. Visit the manufacturer's website: Visit the website of the manufacturer of your graphics card (e.g. NVIDIA, AMD, Intel). Look for the "Support" or "Downloads" section of the website.
3. Download the latest driver: Search for the latest driver for your graphics card model and download it. Be sure to download the driver that matches your operating system version (e.g. Windows 10 64-bit).
4. Install the driver: Once the driver is downloaded, run the installation file and follow the on-screen instructions to install the driver. During the installation process, you may be prompted to select certain options or restart your computer.
5. Verify the driver installation: After the installation is complete, verify that the driver has been updated by going to "Device Manager" and checking the driver version number under "Display adapters".