With the continuous improvement of the maturity of related technologies, projection products have become a necessity in many aspects of daily life and work meetings, training, entertainment and so on. In particular, the rapid development of home projectors in recent years has gradually entered the ordinary family. The coming of the Spring Festival holiday makes the use of home projectors frequent, and if there is a problem, it may make you very disappointed. In order to help everyone, Xiaobian provides some common troubleshooting and troubleshooting methods, hope to help you solve problems.
Pressing the On button does not respond to the projector <br> First, we should check that the power cord plug is in good contact; check that the filament or bulb of the projector lamp has exceeded its service life. In general, lamp damage is a common phenomenon. When the lamp is lit, the temperature will rise rapidly to thousands of degrees, and the filament is in a semi-blown state. At this time, the projector must not be moved, otherwise it is easy to burn the filament or cause the bulb to burst.
After the power is turned on, the brightness is normal but the image cannot be displayed. <br> After the projector is turned on, there is no signal input, which can be summarized as follows:
One is to stay on the four small screens after booting, especially the Sharp projector. When using this brand of machine, if the lamp is not fully cooled and the lamp is not fully cooled, the power will be cut off and the projector will automatically run this protection function.
Second, the signal is not switched correctly, except that the projection system button does not operate according to the corresponding instructions, and the output signal of the notebook is not switched out. Under normal circumstances, when the system keys are completely correct, we will also encounter the situation that the projector does not display. This is also because the signal is not switched correctly, the user needs to operate the buttons of the PC device and the projector correctly, and the related buttons depend on the machines of different brands.
Finally, we have to check that all signal lines are connected properly, that the connection plug is loose or that the contact is poor. In general, we should develop the correct operating habit of turning on the power of the projector after turning on the projector, and check whether the external video interface function of the computer is turned on.
Image color deviations <br> When we use the projector, we usually have a relatively fixed debugging of the color control parameters of the main menu. If this parameter setting is messed up by others, the projection display image will also be biased. At this point, we need to re-adjust it with the remote control.
In addition, the looseness of the plugs at both ends of the signal line (computer and projector end) causes the deviation from tilting or broken needles, which may cause a certain color signal to be transmitted. For example, in the case of a ceiling mounted projector, it is generally very Less movement, the distance from the computer will be far. If the connected video cable is too long, there will be certain problems with the projection display, and of course, serious signal attenuation or color cast may occur.
Image distortion distortion <br> The same as the color setting above, the screen adjustment function setting in the projector main menu may be disturbed by others, we still need to re-adjust with the remote control;
Regardless of the projector's suspension or desktop assembly, the projector may be loose or tilted for a long time. At this time, certain image distortion may occur, and we need to reposition the body.
Text or image blur <br> In general, text or image blur is mainly due to problems with the focus setting. At this time, we need to turn on the projector's setup menu and adjust the focus distance setting. When projecting the demonstration, we should pay attention to the proper distance between the projector and the screen. After the distance is fixed, adjust the focal length to make the text image clear.
In addition, if the projector lens is contaminated with dust, it may cause blurring of text or images. Especially for hanging projectors, if we don't use the lens cover for a long time, it will lead to thicker and thicker dust, which will also affect the projection presentation. At this time, we can carefully wipe the projection lens with a soft cloth, lens paper or special objects.
If the working life of the projector lamp is over, or if the liquid crystal display panel is seriously deteriorated, the above-mentioned blur phenomenon will occur, which generally shows that the brightness of the projection screen is lowered and the sharpness is lowered. In this case, we can send the projector to a professional service point for cleaning and maintenance, because the LCD panel and the bulb are not like the projection lens, we can not clean it casually.
Finally, the display resolution of the computer equipment should also match the projector, especially the refresh rate can not be adjusted too high. Check if the projector resolution is artificially adjusted too low, or the computer display refresh rate is too high, as this may blur text or images.
Lateral or vertical stripes appear <br> At this time, we need to observe whether there are signal clutter around, such as fluorescent lamps, electric fans, air conditioners, and even cars, lightning, etc., which sometimes cause interference to the projector. Communication devices such as mobile phones may also affect the computer, which may also cause horizontal streaks on the display screen.
In addition, if the signal connection cable from the computer to the projector is in poor quality, the plugs at both ends are loose, and the pins in the plug are soldered and soldered, this will also cause streaks, etc. We can also carefully address this point. Check the check.
Image size does not match the screen <br> We often encounter such a situation, the projection picture can not be displayed on the screen normally, not too big or too small. What should I do? We should check if the resolution of the computer is the same as that set by the projector. If the resolution of the projector is set to 1024×768, and the resolution of the notebook is 800×600, the projected picture may appear too small to fill the display screen, and it will be very uncomfortable to watch. (Chinese home theater editorial: The above may be the early situation, now more likely to be the projector image offset, the installation location has a slight change. The current mainstream display ratio is 16:9 and commercial 4: 3 need to correspond)
If there is a stain on the display image <br> If there is a stain on the projection screen? We need to check if the projector lens is stuck with dust or paper dust. In addition, if the display panel of the projector burns out, it may cause stains on the screen. If the stain is not large, the displayed image will not be affected too much, so we can make use of it, otherwise it needs to be returned to the manufacturer for replacement.
In addition, we should also develop the habit of shutting down with the remote control. After the projector's light bulb is extinguished, wait for a few minutes after the air cooling and cooling, then cut off the power supply directly. Do not directly power off the main power switch. This can cause rapid aging of the display panel, which in turn can cause stains on the displayed image.
Sudden shutdown caused damage <br> When applying the projector, we usually encounter sudden shutdown, such as sudden power failure in the classroom, power plug is cut off and so on. If the projector does not dissipate heat, such as dust accumulation in the inlet and outlet, the sponge filter is not clean for a long time, etc., or the function of the heat dissipation part is faulty, this may cause the internal temperature of the projection body to be too high, which may cause the projector to suddenly shut down. However, we need to pay special attention to the fact that after the power supply is suddenly cut off, we need to wait for the cooling and then turn it on. In fact, we don't have to worry too much.
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