Solution for non-optimal mode of Samsung t display

Today, we also caught up with Samsung's TB crash, but there was no result in finding a solution on the Internet. Many of our friends were jealous of Samsung's product quality and did not provide a solution. We can't just look at these two good monitors, so it's like shaking a "non-optimal mode" box, so don't worry about it, turn off the power. As a result, after more than an hour, the system returns to normal after it is started (surprise ). Post immediately. I am proud to announce that I have found a solution to the non-optimal mode problem of Samsung 710t display ~~~ The procedure is as follows:
1. Turn off the PC power supply;
2. Unplug the TB power cord;
3. Wait for N hours (n ≥ 1 );
4. Install the T power cord;
5. Open a PC.

PS: Samsung 710 T, Samsung 710N, and Samsung 510n all have similar problems. Once the problem occurs, the display key is locked and the screen displays a floating frame in "non-optimal mode, the PC cannot be used normally. Samsung is recommended to recycle all these LCD series, otherwise it will have a huge impact on the company's image! If it weren't for my luck today, I ran into a solution. It was estimated that the two monitors had already been delivered for repair. Fortunately, no money is spent!

PS2: analyze the possible causes of the problem: 1. It is caused by adjusting the screen resolution; 2. It is caused by secondary display.