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Choose the discussion about experience of the second hand display
The second hand colour display screen is most worth panning gold ore out, but the question is the biggest too. Introduce some our market in the second hand colour display screen for a long times below “  Fight with a weapon ” Experience summarized. Need to prove, buying the secondhand should undertake certain risk, and apt to present various questions. So choose second hand display important one prudent the most, would rather get a bargain, in order to buy and then after seeing clearly. Actually gold-diggers were the poor, in case hit the snare, lost more than gain especially.

Selecting a good second hand display should pay attention to the following several points:

Watch the color of the outer cover

It proves this colour display screen has already been used for a long time that the color of the outer cover turns to be yellow, there are many internal parts to wear out, you had better not buy. Most products outer covers in recent years are milky white. Secondly will price with the abrasive paper by the abrasive paper in the outer cover, some bosses renovate the yellow display outer cover in order to sell the high price with the abrasive paper, so just to make up the number.

Check whether there is damage in the outer cover of the display

Some cracks have been glued with the glue, it is difficult to be found, so should check carefully, especially dispelling the heat will look out even more near more hole. If the crack is minor, can also regard this as the reason to bargain, but if the display with the big crack had better not be bought, because the part within the display will probably already be damaged.

See the data plate of the display

Data plate stick behind chassis, date of production printed with display, type, voltage, performance, producing area above in colour display screen   But some unscrupulous merchant will tear or can judge, come out fine or not number value wipe data plate date,etc. by naked eye off by cheating users.

Check fixed screw and seam in the outer cover of display

If fixed screw is trace twisted or injured of chassis seam, prove this display will certainly make the question, if the machine was very new (have one or two years only) And the cap nut has been already broken can’t bear, it is most likely that this display has been out of order (an incomplete substandard product) many times ,So mainly just sells it, so you had better not buy this kind of displays in chance.

Open the back cover on the spot, look over the internal situation

Depend on part complete, such as shield and put on etc. at first. See circuit to be board too old then, maintain trace, picture tube have picture tube label of producer, the date of production on the label and what the data plate is stuck is compatible. These small matters question can often find out the detailed conditions (if the screw has not been twisted to move of the display, can consider skipping this step)  .

Is the sound of listening to when the display work normal

The display should have no sound while working normally, if you hear the sound, it don’t buy. But there will be some medium-to-high grade displays while starting the machine “  The ” Every one,don’t the anxious, but in that relay work,normal condition.

Try out in person

Take one’s own display card and display card driver, should take one’s own display card, because different display cards reveal on different displays results are different. Then look whether this display can meet your requirement, for instance: Behavior under resolution ratios such as 1280* 1024 85Hz,etc..

Check the focus

Method to open one text file, get tone of Chinese characters minimum or turn up resolution ratio full blast and full of, reject and then. And then see whether the word is clear, are not clear that can let the boss adjust, or a requirement changes one to retry.

Check the unicolor state

A pure color (green is best to adjust the tabletop into) Look whether the color is identical, if had other colors, would prove this display has been magnetized, slighter magnetization phenomenon can be attached with the display to disappear the magnetism selects to dispel, the serious words had better be given up.

Compare degree with the luminance to regulate and test

To compare degree with luminance turn up full blast, look for several color abundant picture see, reveal result satisfied display, such as color and degree of saturation, etc..

Await the opportune moment, check for a long time

The time to test should be a bit longer, propose no less than 40 minutes. Because wear out within some displays, can not find out the trouble while just starting the machine, after a while after the machine was preheated, the question will appear.

Check the function button

Can OSD button which tries the display use handily, should be able to hear ” the ” while still subdueing the magnetism Each combine see picture have the shaky.

The picture tube is a bit worse

Pay special attention to bad some and the display is burnt, bad some refers to the point that can not give out light on the display, this kind it orders to be too much ‘  Exceeds three)  ,Don’t buy firmly. Burn, mean, turn on display for a long time and the picture immobilize, the phosphor powder is burnt by the electron beam, unable full restoration, form a patch. The screen protection program is made for protecting phosphor powder from being burnt.

Ask for the quality to protect

Give play to the work of the talking, ask for more than quality assurance and ” protect and retreat singly ” replacing free unconditionally of more than 3 days from trade company for one month as much as possible ,If it is very easy to go wrong and solve shortly.

The above realizes several main points of buying second hand display in person, wish everybody to buy a second hand display just in accordance with the wish. Certainly, there are more purchase knacks among them, hope too everybody absorbs all the useful ideas, exchange experience.