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

This is normal behavior of the monitor. Dell consumer monitors are inspected at 150-lux ambient lighting (similar to typical office lighting). Use a USB-extender cable to position the wireless USB receiver as far away as possible from the USB 3.0 port.

The percentage of the approximate area, taken by the active part of the screen, to the total front area. Information about whether there is a possibility for wall mounting according to the VESA Mounting Interface Standard (MIS). This box also appears during normal system operation, if the video cable becomes disconnected or damaged. Information about the minimum amount of time, in which the pixels change from one color to another. Very often the manufacturer provides the response time for transition from grey-to-grey (G2G).

Ports

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.

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 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. Ergonomics Information about the ergonomic functions - height adjustment, swivel angles, tilt angles, etc. VESA mount Dell P2421 supports Picture by Picture (PBP) mode. Picture by Picture (PBP) mode is 2 side-by-side images with each image that is displayed at 2560 x 1440 resolution. Change the resolution using the video or graphics card (GPU) utility such as Intel HD Graphics Control Panel.

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Ensure that the video cable connecting the monitor and the computer is properly connected and secure. Approximate width of the display. If the manufacturer does not provide such information, the width is calculated from the diagonal and the aspect ratio. The video cable might cause dim or discolored video, try reseating it or replacing it with a known-good cable.