Click my DELL-username and via private message, send me the monitor service tag number, 20 digit serial number, A0x revision number. See the back label.
Using the above data, I can see the build date, warranty status in our system, etc. We on the USA Forum cannot facilitate the service tag ownership transfer. Only Dell Germany can do this. The smearing is the yogore/mura defect and it cannot be fixed or repaired by Dell.
Social Media Support
Run the PC pre-Windows diagnostics
Run the Monitor Reset & BID (Built-in Diagnostics)
Out of Warranty Support