Size- we believe that 24-inch is just the right size for a monitor these days, not too big, neither too small. Whether it is for gaming or for general office work the usable space on this screen would be more than enough, without overtaking your desk space. Wireless USB peripherals responding slowly or only working as the distance between itself and its receiver decreases. Change the input color format to computer RGB or YPbPr in the Color Settings using the On-Screen Display (OSD) menu. Change the resolution using the video or graphics card (GPU) utility such as Intel HD Graphics Control Panel. On certain video and applications with fast moving images, imaging ghosting, which appears as a trailing shadow, may occur.

The operating humidity shows the acceptable level of humidity, in which the display will function flawlessly. It sets a lower and an upper humidity level for safe operation and is measured in percentage. The operating altitude shows the maximum admissible altitude, at which the display will function flawlessly. Above this level it might not operate properly and/or might seize to function. According to industry standards, a few persistently bright or dark pixels are normal. The number of pixels permitted varies depending on the display. See the Dell LCD Monitor Pixel Guidelines for more details. When you notice screen abnormalities like distortion, clarity, horizontal or vertical lines, color fade , it is always a good practice to isolate the monitor by running the Built-In Diagnostics. The video cable might cause dim or discolored video, try reseating it or replacing it with a known-good cable.

Resolution / Refresh Rate

Dell P2421 monitor uses a curved IPS panel, the corners of the screen may appear slightly yellowish or pinkish, especially when viewing in a dark room. This is normal IPS panel behavior and typically does not affect the overall viewing performance. The most widely used panels are those with 6, 8, and 10 bits for each of the RGB components of the pixel. They provide 18-, 24-, and 30-bit color, respectively. Your Dell P2421 Monitor has an integrated diagnostic tool. Hardware diagnostic helps determine if the screen abnormality issue is with the monitor or the video card on your computer. Disable the YCbCr setting from the video or graphics card (GPU) utility such as Intel HD Graphics Control Panel

The NTSC (1953) color space is introduced in 1953 by the FCC with the appearance of color television and has a wider gamut than the sRGB. Change the color-setting mode in the Color Settings using the On-Screen Display (OSD) menu to Graphics or Video, depending on the application. Approximate diagonal size of the display. If the manufacturer does not provide such information, the diagonal is calculated from the width and height of the screen. If you observe any screen anomalies, you should isolate the monitor by performing the built-in diagnostics (BID). When changing the monitor’s resolution from Windows Display Settings, the image quality may not be good.The following table contains information about troubleshooting USB issues on your Dell P2421 monitor. Table 4: Troubleshooting USB issues on Dell P2421 monitor. The operating temperature shows the safe temperature range (from minimum to maximum), within which the display will function flawlessly. Outside this range it might operate improperly and/or fail entirely.