Monitors suddenly stop working?

As of today, all of my three monitors have stopped working. It started at the beginning of the day: The first monitor (connected to my 1060 with a display port) did not come on and only flashed blue. You couldn't even access the menu. The same problem had already occurred the evening before, but after 5 minutes of disconnection from the network it went again. So after the first monitor stopped working, but the second did, I decided to just play on the second monitor.

So I put the first monitor away and wanted to use the second instead of the first. But when I connected it again - also via Displayport - it found no signal. However, I was able to access the menu. Then I connected a third monitor via HDMI to rule out that it is due to dp. This had the same behavior as monitor 2, no signal, but access to the menu.

Monitor 1: Samsung C27FG73FQU (DP)

Monitor 2: AOC G2460PF (DP)

Monitor 3: BENQ GL245H (DP)

Graphics card: NVIDIA GeForce GTX 1060 Zotac Amp! Edition (6GB)

My graphics card is overclocked.

I have already connected all monitors to other PCs / laptops, these showed the same behavior.

I connected the Displayport monitors to the on-board graphics card

I completely disconnected my PC from the mains for 10 minutes, also no change.

I'm really at the end and don't know what to do anymore.

I just can't imagine that all 3 monitors suddenly break.

Maybe your GPU shot the monitors.

If they were broken, I could no longer access the menu, could I?
With the Samsung monitor, I also assume that it is broken because it shows no picture at all.

A menu access does not necessarily require a signal input

Try other power supplies on the monitors if possible, but make sure that the voltage connections are correct, etc.

do not know obs firmware driver oderso for monitors, but you can search.

otherwise maybe try the monitors without a power supply and put them away for a long time…

So I just connected the 3rd monitor to a laptop via dvi and it works. Now I'm really confused.

What exactly do you mean by other power supplies? Power cord?

Possibly other power supplies that have the same connection and bring the same currents etc. From old monitors or other broken things

but I wouldn't actually do it… But if they are probably really broken then it doesn't matter

I still have a guarantee for the first monitor, I prefer not to do that

Have you tested on other graphics cards?

If you have an APU, you can also test it, then you can rule out a GPU defect or a monitor defect if possible. If that works, the best thing is to reset the card to standard clocks and test it.

Test cables etc.

Find the problem after the elimination process