Fix Monitor or Laptop Screen Flickering

Open Task Manager test

Open Task Manager and watch whether it flickers. If Task Manager does NOT flicker but everything else does, the cause is a specific application or driver. If Task Manager also flickers, the cause is the display driver or hardware.

Check the cable

For external monitors: swap the DisplayPort or HDMI cable. Cables with loose shielding cause intermittent flickering that is hard to diagnose otherwise.

Driver-caused flickering

DDU → uninstall GPU drivers in Safe Mode → reinstall latest. For Intel integrated graphics also uninstall and reinstall the Intel Graphics driver.

Refresh rate

Right-click Desktop → Display Settings → Advanced display settings. Set refresh rate to the monitor's native rate (typically 60Hz or 144Hz). Mismatched rates cause flicker.

Laptop — inverter or LVDS

Flickering at specific brightness levels on a laptop often means a failing backlight inverter (CCFL screens) or LVDS cable. Replacement parts are model-specific.