The most collectible projection common troubleshooting method
Students who often use teaching projectors may encounter some problems, such as the projector cannot be lit when it is powered on, or the notebook screen is bright but the projector screen is not bright. These are the projector failure or the mistake in use. What about the operation? Today we will make a big summary of these common problems and give solutions. If the problems mentioned below occur, everyone will know how to solve them.
1. Why doesn't the projector respond to anything after it is turned on?
Answer: Since there is no response after the projector is connected to the power supply, it indicates that the power supply part of the projector is likely to have a problem, but is there a problem with the internal power supply of the projector or the external power supply? For this reason, you should first check Whether the specifications of the external power supply of the projector are the same as those required by the projector. For example, if the external power socket is not grounded or the power cable used by the projector is not equipped with the projector, this may cause the power input of the projector to be abnormal. Once you determine that the external power supply is normal, you can conclude that the internal power supply circuit of the projector has been damaged. At this time, you can only replace the new internal power supply of the projector.
2. Why does the projector suddenly shut down during work?
Answer: If the projector is suddenly shut down during the work, there are two main reasons; one is that the user may accidentally cut off the power of the projector during operation, so you should first check whether human factors have caused the projector to shut down After eliminating this situation, it means that there is a problem with the projector itself, and it is probably caused by thermal protection. Because there are many high-end projectors in order to extend the life of the projector, they often use a self-heat protection function. When there is too much heat generated inside the projector, the working state of the projector will automatically work in this protection state. Turn off the projector automatically, and in this state, the projector does not respond to any external input control; therefore, when this happens, you do n’t have to worry about a sudden failure of the projector, you only need to shut down the projector automatically After about half an hour, turn on the projector according to the normal startup sequence, and then the projector will resume normal operation.
3. Why is there a white or even blue-purple patch on the projection screen?
A: A white or even blue-violet plaque will appear on the projection screen, indicating that the red polarizer in the internal optical system of the projector is damaged, so that the image projected by the projector will have a color cast phenomenon. The solution to this problem is Replace with a new red polarizer. However, this red polarizer replacement operation requires opening the projector's casing. However, due to the high voltage inside the projector, it may cause harm to people's bodies, so you'd better ask professional maintenance personnel to replace the red polarizer. You can also send the projector to a repair shop for replacement.
4. Why can the projector resume normal operation after the power cord is replaced again?
Answer: If the projector can not work normally after changing the power cord, it means that there is no problem with the projector itself. The problem should be the power cord of the projector. Generally speaking, the power cord specifications and compatibility of defective projectors will be significantly different from those of genuine projectors. Once the power cord of a defective projector is used, it may seriously affect the product. Stability of use. For example, the power supply specifications of the projector are 110V and compatibility and 220V. If the unscrupulous manufacturer makes a simple modification of the 110V power supply product to make it suitable for Chinese users, then this product will be confirmed once purchased. Poor compatibility and short service life. Therefore, you must test the power of the projector on the spot when you buy it. In addition, you should also check whether the normal operating voltage of the projector is 220 volts.
5. Why can't the projector project the picture?
A: The projector cannot display the content correctly, which means there may be a problem with the connection of the projector. If the connection is good, please check whether the laptop connected to the projector has activated the external video port of the computer.
Generally speaking, current notebook computers provide FN function switching keys. Press this key and click the corresponding function key marked as LCD / CRT or monitor icon to activate the computer ’s video port; in addition, you should also The signal input port of the projector is used to switch the projector to the corresponding RGB port, so as to ensure the normal projection of the projector.
6. Why can't I project the entire image content?
Answer: The entire image content cannot be projected, which means there is a problem with the display resolution of the projector. At this time, you can readjust the resolution parameters of the computer and the resolution parameters of the projector so that their sizes match each other.
7. Why does the projection machine produce distortion and distortion?
Answer: The content of the projector is deformed and distorted. It is most likely that the position between the projector and the projection screen is not aligned. To eliminate this distortion and distortion, you can adjust the projector ’s lifting foot or adjust the projection. The height of the screen position ensures that the image projected on the screen is rectangular.
8. Why does the projection machine produce image color distortion?
A: If the projector produces image color distortion, it means that there is a problem with the projector ’s color settings. You can press the menu button on the projector ’s remote control or the projector ’s control panel and select all the reset commands under the display menu. If this method cannot solve the color problem, you will need to carefully check whether there are bent or broken pins on the display signal line. If the pins are damaged, you need to replace the display signal line. (Organized by China Educational Equipment Purchasing Network)
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