Dell P2421D - LED monitor - 23.8" (23.8" viewable) - 2560 x 1440 QHD @ 60 Hz - IPS - 300 cd/m² - 1000:1-5 ms - HDMI, DisplayPort - with 3 years Advanced Exchange Basic Warranty, Black

Product Information

Display mode changes from Second screen only to Extended mode after opening and closing the laptop LCD. 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. Information about the maximum horizontal viewing angle, within which the image on the screen is of acceptable quality.

The display mode on your computer reverts to Duplicate or Extend. This depends on which was selected before you changed to Second screen only or Projector only when you close and open the laptop screen. Make sure that the video cable connecting the monitor to the computer is connected properly and is secure. Your computer does not show any indication of activity, the screen is blank and does not display the Dell logo during start-up. Size class of the display as declared by the manufacturer. Often this is the rounded value of the actual size of the diagonal in inches.

Resolution / Refresh Rate

Wireless USB devices responding slowly or only working as the distance between itself and its receiver decreases. Change the color-setting mode in the Color Settings On-Screen Display Menu (OSD) to Graphics or Video, depending on the application. The pixel pitch shows the distance from the centers of two neighboring pixels. In displays, which have a native resolution (the TFT ones, for example), the pixel pitch depends on the resolution and the size of the screen.

On certain video and applications with fast moving images, imaging ghosting, which appears as a trailing shadow, may occur. Monitor will not support the YCbCr color format when a USB-C to HDMI dongle is connected from the monitor to the computer. Approximate height of the display. If the manufacturer does not provide such information, the height is calculated from the diagonal and the aspect ratio. Resolution - we know that for most people Full HD would be more than enough but believe us QHD makes a difference if you compare these side by side. That is actually what we did and we were more than happy to get the2560 x 1440 at 60 Hz. We are not sorry for not getting a 4k monitor since the difference wouldn't be that noticeable on a 23.8-inch display, especially on the ASUS Dual Radeon RX 5500 XT EVO that we will use for theP2421D configuration.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. The ratio between the horizontal and the vertical side of the display. Some of the standard and widely used aspect ratios are 4:3, 5:4, 16:9 and 16:10.