Fix black dot on windows monitor

Why this black dot appears on the screen:

A monitor screen's pixel includes diodes i.e. red, blue and green. A black dot will appear on the the monitor's screen because the three diodes fail. The appearance of the black dot on display is known as dead pixel. This problem takes place because the pixels are either burnt or they are unable to receive signal from the motherboard. By using the recovery app you can easily fix the problem of dead pixels. The recovery apps force the pixels on the screen of your laptop to change rapidly, probably reawakening the faulty diodes. But if you want,  you can also apply slight pressure on the monitor' screen where the black patch is appearing. 

You can also solve the problem with the help of following steps:

1. Using LCD repair:

• Go to the site of LCD repair.
• Click on "Fix my screen". Your browser will now present a full screen pattern of rapidly-flashing basic colors.
• You should run it for at least 20 minutes.
• Now press "Esc" to finish the process. 
• Your screen will now be fixed.

2. Using Jscreenfix:

• Go to the website of Jscreenfix.
• Now click on "Jscreenfix". A window will pop-up on the monitor's screen with a quickly changing colors.
• You need to drag the pop-up window on the black dot so that it can fix the black dot.
• You should run it for 10 minutes.
• Click on the black screen .
• Your screen will now be fixed.

3. Using physical pressure:

• Put a piece of tape above the area of black dot. The piece of tape will help you to find the black dot.
• Now shut down your PC.
• Take a soft cloth and eraser, cover the eraser's end with the cloth.
• Push the eraser's end on the dead pixel for at least 10 seconds and then release it. 
• Repeat this for at least 20 times and your problem will be solved.

I will suggest you to do the 3 option, because it is offline and it will work definitely and in others they are offline and I am not sure that they will work definitely.