LCD screen: The row of 'graveyards' is very risky

Just spend over $ 100 and accept the old stuff, you can get a brand-new LCD monitor for your computer. However, you have to consider SHOULD OR NOT SHOULD be careful before you buy, so you don't have to pick it up.

LCD screen: The row of 'graveyards' is very risky Picture 1

Old LCD screen.Photo: SGTT

Most of the used monitors that are being consumed in Vietnam are those of big brands like Dell, IBM, HP . The main supply is from two places, in the US with the type of screen using the voltage. Autovolt and from Japan if it is a monitor using 110V electricity. Based on the experience of computer products, other electronic products as well as the affirmation of those who are familiar with computer components, the general computer products originating from the above countries are the products that are Standard calibration, stable quality.

The price of old monitors is only half or two-thirds that of new LCD monitors of the same size that Korean firms are selling in Vietnam. Just spending about 120 to 150 USD has got a nearly new 15-inch LCD monitor.

According to Trinh Tien Dung, technical department of Compuland Company, a former unit specializing in old LCD monitor business, compared to other used machines, LCD monitors have used less products. greeting card by the most seller. When picking up goods from importers for sale, retailers have to try each one but cannot buy a whole lot like CRT monitors or other electronic devices. The simple reason is that with the existing old LCD monitor, which one is damaged is always abandoned because there are not many specialized repair places. It is very difficult to collect components from several different damaged ones to assemble one.

Should not

Most LCD monitors are used only for 1 month warranty from the seller. Because there are not many specialized repair places, buyers have difficulties when there are problems. In the case of a fix, the price of the replacement parts is equal, even higher than the price of a monitor. Therefore, during the warranty period, if the product is broken, the seller accepts to exchange the new screen. At the end of the warranty, the buyer accepts "throw" the device.

Most used LCD monitors now have a long time of use, so their lifespan is not much. According to experts, it is difficult for any one to use for more than a year or two. Besides, these are screens that were produced a few years ago, so there are no technological improvements to overcome the defects. So these screens often have a fairly narrow viewing angle, just a little skewed is hard to see. Besides, the screens of these LCDs are often susceptible to color errors, being dead spots to form black spots, white spots, sometimes even appearing on the screen streaks as the image quality is reduction.

An important element of LCD screens is the response time. Currently, there are a number of LCD screens with up to 2milis response time, for many older LCD monitors, the average response time has only reached 14miliseconds. Due to the slow response time, when displaying fast moving images such as watching movies, playing video games is prone to jerks. In addition to the contrast, the brightness of the older LCD monitors is not equal to the new generation later.

How to buy

In case you choose to buy an old LCD monitor, pay attention to the following:

The date (manufacturing date) behind the screen should be considered to select the most recent production time to select the type with a longer screen life.

According to the advice of computer technicians, when buying, choose the product that is running demo (trial run) to display, because the seller always selects the products that show beautiful images to open for visitors to see.

For screen quality, it is possible to carry a software to identify dead spots on the screen, called Deal fixel Locator software (Free software, available at http://www.astris.com for download) to try. With this software, you can set the screen in full black, full white or any color mode to see if the screen's glowing grid has a lot of errors.

Vinh Phuong