Dell 34 S3422DWG 34" 21:9 Curved FreeSync WQHD 144 Hz HDR VA Gaming Monitor - Manual (Page 61)

Troubleshooting │ 61
S3422DWG
The display will go into Standby Mode in 4 minutes.
www.dell.com/S3422DWG
No DP Cable
Dell 34 Gaming Monitor
NOTE: This box also appears during normal system operation, if the
video cable is disconnected or damaged.
4. Turn off your monitor and reconnect the video cable; then turn on your
computer and the monitor.
If your monitor remains dark after you reconnect the cables, check your video
controller and computer.