Poor performance

Identify the visual defect precisely

Describe whether the image is blurry, flickering, washed out, too dim, uneven, tinted, or showing trails. Note whether it affects the whole panel, one edge, moving objects, or only a particular application. Photograph the screen at normal viewing distance, but avoid close-up phone images that create moiré or banding. Check whether the monitor’s OSD text shows the same defect; an OSD is generated by the display and helps distinguish panel behavior from computer output.

Record resolution, refresh rate, input, cable, and picture mode. A low-resolution signal stretched to the panel can look soft even when the monitor is functioning normally.

Check native resolution and scaling

Set the computer to the monitor’s native resolution and a supported refresh rate listed in the manual. If text is too small, adjust operating-system scaling rather than lowering resolution. A non-native mode can make fine text and lines appear blurred. If the desired mode is missing, test a direct connection and verify the cable, dock, graphics driver, and host port capabilities.

Confirm the monitor is not using overscan or an image aspect setting that crops the desktop. If the display offers a sharpness control, return it to the documented neutral value before judging clarity; excessive sharpness can create halos around text.

Separate color and brightness from signal quality

A dim, washed-out, or oversaturated image may result from brightness, contrast, color temperature, HDR mode, or an operating-system color profile. Check whether the issue appears across all sources. Compare a neutral factory preset and adjust one control at a time. A computer color profile should be associated with the correct monitor, particularly in a multi-screen setup.

For HDR, verify support across the monitor, input, cable, graphics card, operating system, and content. HDR can change desktop brightness and tone mapping. If the image looks wrong after enabling it, disable HDR temporarily and compare the same content before changing calibration controls.

Investigate flicker, trails, and unevenness separately

For flicker, note whether it occurs at a specific refresh rate, brightness level, input, or variable-refresh setting. Test a supported refresh mode and known-good cable. For motion trails, reduce response acceleration or overdrive one step and compare a moving scene; extreme settings can create bright or dark overshoot. If the defect remains on the monitor’s self-test, document it for service.

Uneven brightness or fixed discoloration across the panel is different from a bad cable. Do not press or massage the screen. Use the exact model’s pixel or uniformity policy to assess an issue and contact support with a photo and purchase date.

Compare with a second source or diagnostic pattern

Show a plain gray, white, or black image and compare it with the same field on a second source if available. A fixed blotch or line that remains on the monitor’s built-in test suggests a display-side concern; a problem that changes with the application or host points elsewhere. Use the manufacturer’s supported self-test rather than a downloaded pattern that flashes rapidly or risks triggering photosensitivity. Note whether the artifact appears at normal viewing distance and whether it is visible on the OSD.