LCD screens are now widely used in our daily lives and work, and their presence can be seen in many places. So, what should be done when LCD screens have some malfunctions? Today, the manufacturer of high brightness LCD screens will introduce to you the common faults and solutions that LCD screens may encounter.
1. The LCD screen suddenly turns on but does not turn on, and the power indicator light remains on
It is generally caused by abnormal high voltage, in which case there is a display on the LCD screen, and the viewing method is to "squint". Comparative repair method should be used. Because nowadays, the design of high-voltage boards for LCD screens is generally symmetrical, and there may be almost no damage to both sides. Old machines are generally prone to problems with step-up transformers and light tubes, while new machines have more problems with protection circuits and processes.
2. Color deviation fault
Generally, adjustments can be made by entering the maintenance and adjustment mode.
3. The entire LCD screen is without power
This is a simple malfunction, which can be divided into two types: internal power supply and external power supply. External power supply is more common. Regardless of the type of power supply, its structure is much simpler than that of a CRT display screen power supply. The vulnerable parts are generally small components such as fuse tubes, input inductors, switching tubes, and voltage stabilizing diodes.
4. LCD screen bright or dark lines
This type of problem is usually a malfunction of the LCD display screen. A bright wire fault is usually caused by a problem with the ribbon cable connecting the LCD screen body. A dark wire is usually caused by leakage in the screen body. The above two problems are basically the death penalty for the machine and have no repair value because the price of a single screen is too high.
5. Flower screen or white screen
This type of problem is usually caused by the driving voltage of the screen. If the driving circuit of the LCD screen is on the motherboard, it should be a fault of the motherboard. If the driving circuit of the screen is on the LCD screen, the LCD screen should generally be replaced, and the risk of maintenance is high.
6. Other relatively rare faults
In different working modes, LCD screens may experience some interference, most of which are normal phenomena, and a few are caused by the circuit. Because of the special production process of LCD screens, only problems detected in standard operating modes can be considered faults.
Ruxin Gaoliang is committed to creating long-term value for our customers. We are a high-quality domestic LCD display manufacturer with 13 years of experience in research, development, production, and sales, specializing in various types such as high brightness screens, bar screens, and small-sized LCD screens. We provide one-on-one professional services for you.