Dell UltraSharp 1909W AIO User Manual page 29

Removing the Cable Cover and Cables from the Computer
1. Remove the optional security lock (if used).
2. Lift the unlock button in the cable cover, and lift the cable cover to remove it.
3. Push in the release button on the power cable before removing it from the computer.
Detaching the Monitor from the Stand
This monitor is VESA compliant for wall mounting, and detaching the monitor from the stand is necessary.
Steps for removing the monitor from the stand:
1. Press the stand removal button to release the stand.