How to identify the refurbished LCD display

Nowadays, LCD monitors are getting cheaper and cheaper. Many DIY merchants start to sell fake LCD monitors and refurbished LCD monitors to seek profit. The low quality is conceivable. The fake LCD monitors are relatively easy to identify, but refurbished well-known brand monitors It is easy to be fooled by consumers, and sometimes it is difficult for many inside professionals to identify. The following editor will introduce you to the method of identifying refurbished LCD monitors.

　　How to identify refurbished LCD monitors:

　　 1. Pay attention to check the appearance of traces of use

First look at the appearance. Generally, there are very few high-end refurbished products (because it will cost a high price, it is a question of whether it can be sold). Traces of used. Carefully observe the vertices of the monitor frame, and you will find that there are wear and tear in some places, especially under the base of the monitor. Since it has been used for a period of time, there must be more or less wear on the bottom. In addition, carefully check the heat sink and the data cable socket behind the monitor, which will leave some traces of dust and plugging.

　　2, the color of the refurbished monitor is not good

Open the monitor and enter the system. Generally speaking, under normal use, the LCD screen of 3 to 4 years will make you feel a little yellowish, or the color is not bright enough. The LCD screen is the most difficult to replace among the refurbished parts, and it is also the easiest Identify whether it is a measure of refurbished products. Generally, you can run a colorful, high-resolution picture or video to distinguish, or you can use Nokia Monitor Test 2.0, a display testing software to detect.

　　 3. See if there are "dead pixels" on the display

The difference between liquid crystals and transistors, liquid crystals, as the name suggests, is "liquid" inside. The longer it takes, the aging of the liquid crystal will be faster than the aging of the transistor. The so-called dead pixels are: the liquid crystal cannot cover the area of the screen . Generally speaking, domestic manufacturers control the number of dead pixels of LCD monitors to within 3, which is called "A-level screen" in the industry. This standard is also the domestic LCD shipment standard, and more than 3 are considered defective. , Is not allowed to go on the market, the majority of netizens should also pay attention to this point. Therefore, the number of dead pixels on the LCD screen and the vividness of the colors are the "final standards" for directly identifying the quality of the display!

　　4, look at the model to determine whether the display is discontinued

　　 First of all, we need to know that most of the refurbished LCD monitors are reworked machines and purchased second mobile phones. Therefore, they are generally the models that are on the market earlier, and most of them are 17-inch and 19-inch products. Therefore, if consumers find that the display model they choose is relatively old when buying, the manufacturer has already shown that it has been discontinued for a long time. It may be a refurbished machine, which requires special attention.

　　 5. The monitor that has been out of the factory for more than one year is likely to be refurbished

　　 To know whether the LCD monitor is refurbished, the most straightforward way is to enter the factory mode to understand the use time and factory time. Since the use time in the factory mode cannot be manually cleared, it is more accurate to judge the actual use time of the product. For some LCD monitors that can't find factory mode, you can try a few more times. If you really can't find the factory mode, you can also check the factory time of the monitor through the software of Master Lu. Although products with an earlier time of delivery are not necessarily refurbished products, it is hard to say if LCD monitors have been delivered for more than one year.

　　 6. Please be careful about the prototype when buying a monitor

　　 In addition to the refurbished machine, sometimes you may also encounter a prototype, this should be paid special attention to. As a demonstration machine, it takes at least 8 hours a day to operate. Some merchants will replace the prototype after two or three months of use, clean it up and sell it as a new product. Although it is not a purely refurbished product, no one wants to buy such a machine. And because the use time is very short, it is difficult to see the problem through the appearance and screen. At this time, the best way is to enter the factory mode to check the usage time, and you can also check the degree of wear of the monitor's data cable socket.

　　 Tips for purchasing LCD monitors:

　　1. When you buy a new LCD monitor, when there is no power, the darker the screen and the darker the color, it indicates that the quality of the monitor is better and the degree of reflection is lower!

2. Basically all businesses in the Computer City often use very beautiful images when they show you LCD monitors, but many netizens find that there are multiple dead pixels on the LCD screen after purchase and during normal use. Or dark spots or bright spots, you must pay special attention when purchasing.

The above is the method for identifying refurbished LCD monitors summarized by the editor. I suggest that you know more about relevant knowledge before buying LCD monitors. Although LCD monitors are now more and more favorable, you can buy a suitable one. The product is our ultimate goal. We can't buy defective products just to save some money.