Symptoms
Monitor flickering is an issue where the screen intermittently changes in brightness or color, causing a distracting and sometimes uncomfortable viewing experience.
Cause
This can be caused by several factors, including loose or damaged cables, outdated or incompatible display drivers, incorrect screen refresh rate settings, or even electrical interference.
Resolution
Flickering Video on Dell Gaming or Alienware Monitors
If you are using a Nvidia graphics card and G-Sync is turned on but your monitor is NOT G-Sync Compatible, flicker can occur. List of Dell FreeSync Gaming Monitors that are G-Sync Compatible can be found here: Dell AMD FreeSync Monitors that are Nvidia G-Sync CompatibleEither turn off G-Sync or use FreeSync with an AMD graphics card.
Note: Dell Gaming monitors using a vertical alignment (VA) panel are S2721HGF, S2422HG, S2722DGM, S3222DGM, S3222HG, and S3422DWG. All these monitors, except S2721HGF, are NOT G-Sync Compatible. Because of this, flicker is expected if G-Sync is turned on. To fix this issue, either turn off G-Sync or use FreeSync with an AMD graphics card.
Run the monitor Built-in Self-Test (BIST): How to Run a Diagnostic Test on a Dell MonitorIf the BIST passes, the issue is NOT with the monitor. Check your system (BIOS, graphics card, drivers, etc).Update the graphics card driver and firmware to the latest version. Change the cable connecting the monitor to the computer. A defective cable can cause the signal to break while being transmitted across the wire. If the monitor has an Overclock feature and it is turned on, try to turn it off. Operating the monitor at a refresh rate higher than the panel specification can cause flicker. If the monitor has a Moving Picture Response Time (MRPT) or Ultra Low Motion Blur (ULMB) feature and it is on, try to turn it off. Check the surroundings. Electromagnetic fields can cause screen flickering. If there is another device plugged into the same power strip as the monitor, try to remove it.
Links to More Information:
Dell Gaming and Alienware Monitor Frequently Asked QuestionsDell AMD FreeSync Monitors that are Nvidia G-Sync CompatibleHow to Troubleshoot Display or Video Issues on a Dell MonitorHow to Run a Diagnostic Test on a Dell MonitorFlickering Alienware MonitorsTroubleshoot a Flickering Screen after a Windows 10 Upgrade
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