DELL U2414H - Black Screen Issues

Hi guys !

I just got a problem regarding my monitor that suddenly stopped working.

Yesterday when I turned the PC on my main monitor (I got dual screen) show me a full grey screen with some sort of pixels in different colors and after few seconds went black.

The second monitor, a DELL one too, just different model still working normally.

What happens Is the PC turns on normally, the monitors shows that there Is power coming through, but does not show ANY image( I can't even access the menus)

I started from the basics:

- Unplugged all the external cables, plugging back and restarting the computer a few times.

- Pull the main internal parts & cables inside the case apart and plug all back In and restart.

- Tried to plug my third monitor that I got spare (another DELL) replacing the one with problems and

It works, (the third monitor works) using same display port cable and plug, as the faulty was using.

- Tried to replace display port cable fora new one.

- Tried to replace the display port order, as the monitor got 2.

- Tried to update drivers using the DELL website.

After all those attempts I found that help was needed !

I just realized that the computer Is not showing the monitor anyway. Cannot detect or Identify accessing display settings, It only shows the primary !

Just resuming, Monitor turns On, does not display ANY images (cant access monitor menu either as I cant see nothing) just shows a full black screen !

Does anyone have a clue ?

Would be much appreciated !

Best Regards,
Gus