DELL E Series E2725HM Computer Monitor - 27" Full HD - Black

The monitor has a refresh rate of 100Hz.

No, the monitor does not have built-in speakers.

The monitor has HDMI, DisplayPort, and VGA ports.

No, the monitor does not have a built-in USB hub.

The warranty period is not explicitly mentioned in the provided product data.

No, the monitor's stand only allows for tilt adjustment; there is no height adjustment.

Yes, it supports VESA mounting with a 100 x 100 mm interface.

Check the power cable connection to both the monitor and the power outlet. Ensure the power outlet is working.

Check the video cable connection between the monitor and your computer. Try a different cable or input port. Ensure the computer is turned on.

Adjust the monitor's resolution and refresh rate settings in your computer's display settings. Ensure you are using the native resolution of 1920 x 1080.

Adjust the color settings in the monitor's on-screen display (OSD) menu or in your computer's display settings. You can also try resetting the monitor to its factory settings.

Try a different refresh rate in your computer's display settings. Check the video cable connection and ensure it is securely connected.