if the monitor is out of order, reconnect the button circuit or disassemble the monitor and blow it with a hair dryer. There is too much dust. Clean the dust everywhere in the computer regularly. The resolution of the computer is not set properly. Adjust the resolution again. System problems, update the graphics card driver or reinstall the system. The keyboard or mouse button is out of order, just replace it. The causes and solutions are as follows: 1. The display is faulty, which may be that the button circuit is shorted; It may also be because the weather is wet and there is electricity leakage between the adjustment control buttons. If you have hands-on ability, you can open it yourself and try to dry it with a hair dryer. 2, too much dust, especially in the environment with high humidity, or in rainy weather. It is recommended to clean the dust around the computer regularly to keep it clean. 3. The resolution of the computer is not set properly. If the resolution is not set to the state of computer adaptation, it will automatically pop up, in order to set it to the most appropriate state. This situation is still relatively easy to solve, and the resolution should be readjusted to make it adapt to the computer. 4. There may be a system problem. It is recommended to update the graphics card driver first, and reinstall the system if it doesn't work. 5. It is also possible that the keyboard or mouse is squeezed, resulting in button failure, which will lead to this situation. Pull out the mouse plug first. If you don't pop up the left-click menu, you can judge that it is a mouse problem, and the keyboard can also be detected in this way. If these two accessories are out of order, just replace them directly.