Handling and troubleshooting common faults of microcomputer display

1. The display is not displayed

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(1) Check the power supply of the screen body, and use the test pencil or multimeter to check whether the power supply end of the switch connection has electricity. Is there a problem with the switch or checking if the line is broken?

(2) Display screen synchronized with the computer, first check whether the computer enters the sleep state; if it goes to sleep, first enter the "Control Panel", click "Power Management", select the "System Waiting" and "Close Monitor" options. Never "optional", so that the computer does not sleep, the display can work normally; if it does not go to sleep, you can open the chassis, check whether the control card and communication cable are plugged in securely, check the communication cable for disconnection.

2. The display file is incomplete or the location is incorrect.

(1) Check whether the parameters of "display position" and "screen size" in the software are the same as those given by the installation engineer. If you don't know the parameters, you can first count the length and width of the pixels on the screen. When the screen size is determined, look at the difference between the display area on the screen, and then go back to the computer to adjust until the position is consistent. until.

(2) If the display is not comprehensive, you should check whether the file size is the same as the "screen size" of the screen.

(3) Open the chassis and check if there is a short circuit on the control card.

3. Communication display is not available

(1) Check that the parameters in the software are consistent with those given by the installation engineer.

(2) Check if the serial port is securely connected and the communication line has a broken line.

4. The display is jittery and has a horizontal bar

Check if the common ground wire connected to the computer is loose, or if the communication cable is loose. If the operator cannot determine the cause of the problem, or is not very familiar with the computer, do not open the case easily, and then contact the manufacturer before handling.

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