The motherboard is a system that operates at low power. When it is powered to a location, any cause of power supply is not normal.
The projector is protected and the lamp indicator will be on. What is the reason? The bulb is useless; there is a problem with the protection system; there is a problem with the motherboard or temperature control with video, no RGB signal or no video or no RGB signal. In general, the signal is charged and the grounding is poor, which causes the video board channel to be burnt; the video board or RGB board accounts for 50%, and the motherboard reason accounts for 50%.
What is the reason for the vertical bar on the screen? If there is a vertical strip in the monochrome, the damage of the LCD panel accounts for 80%, and the damage of the driver board accounts for 20%; if it is the vertical color of the three colors, the main board is 70%, followed by the LCD panel and the driver board. (30%)
What is the reason why the projector is not equipped with enough brightness? A machine with a brightness of 500-800 lumens is darker than before when a new light bulb is installed. It is because his optical system has a light mist and dust, which reduces its transparency by 50%-80% or even 100%. High-brightness projectors are not bright enough, mainly because the glass of the light-passing is broken, and the light cannot penetrate the past; problems with the motherboard can affect its brightness.
Cannot be compared to a new projector after installing a new lamp. Because the new projector optical system is new, the old projector has some dust inside the main optics, or the glass of each part of the optical path of the old projector has deteriorated or deteriorated.
The lens of the old lens of the lens has a part of dust and smoke in some parts of it after a certain period of time. It also affects a certain brightness. What is the cause of blurred spots? 1. The spectroscope and the positive film burnt in the optical account for 80%; 2. The dust particles adsorbed on the liquid crystal film are too much.
The image appears in a regular circle. What is the reason? 100% is a problem with the LCD panel, and most of the Sony LCX series LCDs have this situation.
After the power is turned on, the indicator light is on, but there is no boot background screen. Only the power button can be used on the control panel. Other buttons cannot be used, and there is no signal. One possibility is that the lamp has a problem, and the other is that there is a problem with the lamp power supply.
The liquid crystal film is displaced, and three LCDs converge during the projection. The RGB colors do not overlap. The lenses and mirrors in the optical system may also be deformed or damaged, affecting the image quality, the zoom lens track is damaged, the lens is stuck, or even the lens is broken. Use... The most likely occurrence of these phenomena is caused by strong collisions, crushing and vibration.
The ceiling mounted projector has a very different ambient temperature than the one below. Why? This is a problem caused by the rise of hot air; most users hoist the projector, often only pay attention to the surrounding environment, and forget the problem of hot air rising, so that the temperature around the projector is very different from the following, so to ensure the room Ventilation and heat dissipation in the upper space.
A sparking phenomenon occurred in the plug and socket, which damaged the signal input circuit. In the circuit part, it is strictly forbidden to plug and unplug the cable. The signal source and the projector power supply should be shared at the same time. Since there is a different power source when the projector is connected to a signal source (such as a PC), there may be a high potential difference between the two zero lines. When the user plugs in or unplugs the signal line or other circuits, the fire will occur between the plug and the socket, which will damage the signal input circuit and cause serious consequences.
Does the projector have no power indication when the power is turned on? Check the power supply for any problems. If there is no problem, the power supply is damaged.
To cast a color cast, check the VGA cable first to see if the pin is plugged in or the connector is broken. If not, it may be a problem with the optical system.
There is no image signal in the background picture. Check the connection line first, then check whether the projector signal selection is consistent with the signal source. If there is still no image picture, check whether the computer normally transmits the signal.
Projection image ghosting, in most cases, due to poor performance of the connection cable, the transmission distance is too long, when replacing the signal line, pay attention to the matching problem with the device interface; the signal interface circuit suddenly turns off automatically during the use of the fault, but after a while Turn the lights back on.
The heat dissipation during the use of the machine causes overheating protection, and the thermal protection circuit is automatically activated, causing power failure.
A color cast phenomenon occurs at the edge of the projected picture. The position of the optical lens inside the projector is shifted.
The image projected by the projector is obviously tilted. The screen is not perpendicular to the projector. You need to adjust the position of the projector so that it is perpendicular to the screen at 90 degrees.
The image projected by the projector is wider on one side, and the deviation occurs. The screen is not perpendicular to the projector. You need to adjust the position of the projector so that it is perpendicular to the screen at 90 degrees.
The picture image is very blurred, the light engine, the LCD film are dirty; the focus is not in place; the machine enters the high temperature environment from low temperature, and the lens is dew condensation.
The center of the screen thrown by a liquid crystal projector is brighter, but the dark light engine sucks a lot of dust around it, and it needs to be cleaned by the whole machine; the multiple sets of lens aging projector light bulbs in the light engine have not been so bright after using for a period of time. What? A large amount of dust is inhaled in the light engine and must be cleaned. The lamp is aging and needs to be replaced.
Many people do not know what kind of cameras are invisible cameras, and do not know how to distinguish invisible cameras, so here is how to distinguish invisible cameras.
Invisibility, as the name suggests, means that it is not easy to be seen or found, so where do such cameras exist? In fact, invisible things are hidden by the external environment, so they will not be discovered. Such invisible cameras are generally hidden in things that are more difficult to see, such as: inside the socket, inside the TV, inside the stereo, inside the fan, etc. Cameras can be hidden in various household appliances. Why should they be hidden in electrical equipment? The main reason is that these equipments have power supply and will not be used because the camera cannot be powered.
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