test goodHow to repair quickly

How to deal with TEST GOOD when the Samsung monitor is turned on:                                                                                                                                                                                                                                                   ## . Check whether the computer host interface is plugged in properly, and try re-plugging both the monitor and host sides. If possible, the signal line can be replaced for detection.

2. Check whether there is an independent graphics card. Nowadays, motherboards with integrated graphics generally also have independent graphics slots for installing independent graphics. After installing the independent graphics card, the integrated graphics will be automatically turned off. Please check if The wrong graphics card interface is connected.

3. Please bring your purchase receipt to a regular Samsung repair station for inspection and repair.

This is a self-test process that is carried out inside the monitor through a built-in self-test program after the monitor is powered on to determine whether the working voltage of each part of the monitor meets the conditions for normal operation.

When everything is normal, the user will be prompted that "TESTGOOD" self-test has passed and the display status is normal. Can be used normally.

The display (display) is also often called a monitor. The monitor is an I/O device of the computer, that is, an input and output device.

It is a display tool that displays certain electronic files on the screen through a specific transmission device and then reflects them to the human eye.

According to different manufacturing materials, it can be divided into: cathode ray tube display (CRT), plasma display PDP, liquid crystal display LCD and so on.

Liquid crystal is liquid crystal, which is a very special substance. It flows like a liquid and has some optical properties of a crystal.

Liquid crystal was discovered by the Austrian botanist Reinitzer in 1888. It is an organic compound between solid and liquid with regular molecular arrangement. The arrangement of liquid crystal molecules has a certain order, and this order is External conditions, such as changes in temperature and electromagnetic fields, are very sensitive.

Under the action of an electric field, the arrangement of liquid crystal molecules will change, thus affecting its optical properties. This phenomenon is called the electro-optical effect.

Usually an alignment film is installed on two glass substrates, and the liquid crystal will be aligned along the grooves. Since the alignment grooves of the glass substrates are deviated from 90°, the molecules in the liquid crystal are in the same plane, one by one, like blinds. Arrangement, and the nematic molecules will gradually twist 90° when transitioning from one liquid surface to another. That is to say, the phases of the arrangement of the two layers of molecules are 90° different.

Generally the most commonly used type of liquid crystal is nematic (nem different types of displays) liquid crystal. The molecular shape is an elongated rod shape with a length and width of about 1-10nm (1nm=10Am). Under the action of different current and electric fields Under the condition, the liquid crystal molecules will be regularly rotated 90 degrees to produce a difference in light transmittance. This will produce a difference in light and dark under the action of turning the power on and off. By controlling each pixel based on this principle, the desired image can be formed.

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