If the cables are connected well, you should try updating your PC and restoring the monitor to its factory default settings.
If your Dell monitor is not connecting to your laptop or PC, check its cabling. But depending on your laptop’s design, you may run into issues joining your Dell monitor as a second screen. These devices can connect to your computer as an external display for games, video streaming, and entertainment. Modern Dell monitors combat glare and have a more ergonomic design than others on the market.
