Dell ST2321L Monitor - Manual (Page 29)

If your monitor displays an image, installation is complete. If it does not display an image, see Solving Problems .
Attaching the Soundbar (Optional)
Removing the Monitor Stand
After placing the monitor panel on a soft cloth or cushion, complete the following steps to remove the base.
1. Use a long screwdriver to push the release latch located in a hole just above the stand.
2. Once the latch is released, remove the base away from the monitor.
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1. Working from the rear of the monitor, attach the Soundbar by aligning the two slots with the two tabs along the bottom rear of the monitor.
2. Slide the Soundbar to the left until it snaps into place.
3. Connect the Soundbar with the DC power connector.
4. Insert the mini stereo plug from the rear of the Soundbar into the computer's audio output jack or the monitor's audio output jack.
NOTICE: Do not use with any device other than the Dell Soundbar.