But now a small, important point: I now had the problem that at start-up of the PC, the monitor appears to the right source investigated. In my case it is the HDMI port. So it happened that the monitor was turned on briefly for a few seconds, but then threw a black / gray stripes on the desktop and "umswitchte", the black stripes came back again "umgeswitcht" and so on. Until it was sometime after the third, fourth time and went all black nothing. No picture and the menu I came. So the picked up the phone and checked with Samsung. Answer: "exchange, duration 10-14 days" This was me frankly too long so I tried myself a bit rum. Solution was found here:
Have the power cord away (during operation) and then shut down the PC. Ramped, lo and behold, image! "Manual" provided quick and the menu under "source identification" mode from "automatic". Since then, no longer a problem !!! Maybe it was coincidence, etc. maybe not, I am not a technician, but in my case this has helped and is always a better solution than 2 weeks to wait for a new device.
If someone has a similar problem, this review might help him further.
Greeting