How Do I Recycle a Computer?

Generally refers to a computer that has been used after a period of time or some hardware has been damaged, and then re-entered the trading market after repair. It is a relatively new computer.

Second-hand computer

Generally refers to those that have been used after a period of time or some of the hardware has been damaged, and then re-entered into the trading market after repair.

Foreword: Second-hand risks, so start with caution

Second-hand computer trading channels mainly include professional second-hand markets and online private transactions. If you are experienced, you can buy directly from private companies, which is more cost-effective.

The price of second-hand computers is much cheaper than new computers, but the performance of computers is very different. Because computers are updated quickly, support for new software and hardware also needs to be tested before it can be determined. Some second-hand computers are actually parallel computers, especially laptops, and more are used. Such computers are difficult to obtain after-sales service such as maintenance, but their performance is basically the same as that of new computers. Some are Hong Kong banks, which are licensed in Hong Kong, and may be repaired. Services, but such services are generally more expensive, and it is difficult to get 100% guarantee.

Second-hand computers are the same as new ones, and some are branded

Points to note when buying a used computer:

1. The price must not be too low. Buying second-hand computers from regular second-hand stores is mostly for recycling old computers. If the price is low, there may be some problems hidden, and the buyer will drive down the price. At this time, don't be greedy for cheap.

2. The hardware factory date should not be too old. One is that the hardware that is too old to date may not meet the performance requirements, and the other is that the value of the old hardware is very low. Even if you buy it, it will not take a long time to cause various problems.

3. The number of times the hard disk is powered on should not be too high. Hard disks higher than 10,000 times are basically waste products.

4. Check each item

1. Hard disk selection of used hard disk must be cautious , do not covet cheap, because hard disk is generally a non-repair product, hard disk damage, especially internal damage is difficult to repair. If the hard disk has bad sectors, it cannot be seen from the surface. In addition, pay attention to whether the hard disk has been repaired. Take a closer look at the back of the hard disk. If you see a "R" after the date, the date marked will be the date of the hard disk repair, not the date of hard disk production. If you see the words "REFURBISHED" "), It goes without saying that this must be a hard drive for repair. The most important point is that when buying a used hard disk, it is best to re-partition and format it in front of the merchant. If everything goes well, then this hard disk can be used.

2. Motherboard and graphics card When buying board accessories such as second-hand motherboards and graphics cards, first look at the solder joints on the back. If there are new solder marks or some solder joints are obviously different from the surroundings and appear rough, you can basically conclude that it has been repaired of. Take a look at the capacitor on the front of the card to see if it is damaged. If you find that the capacitor has bulged, don't buy it. Although you are using it all right now, but after a long time, there is no guarantee that nothing will go wrong. In addition, if you see that there are several layers of labels on the board, and the dates are different, some dates are very long apart from others, so you should be wary. Maybe they are also returned for repair. The repair of this type of board actually requires very high technology, and there is no professional repair equipment in general. Most people just have headaches and foot pains. A chip is burnt out, but repairing it is actually easy. But why is it bad? What causes it? Will the same problem happen in the future?

3 Monitors For second-hand monitors, I do nt intend to say more here. The monitors have problems such as being unable to open, color cast, and blurry display. After repairing, they can be used for a maximum of one year. After one year, they should end their lives, and there is no repair if they want to repair them. Worth it. After more than half a year, those monitors really had problems one by one. Some of the second-hand monitors sold in the market look new, but they are actually sprayed with a new coat of paint, but the life of the monitor will not be extended as a result. The new appearance is only a psychological comfort. If you buy such a monitor, you might as well buy a new one, which will also protect your health.

4 Optical drive optical drives are used with high frequency and short life. Considering that the accessories in the second-hand market are often inevitable, this makes the originally fragile used optical drives more vulnerable. Therefore, it takes a lot of effort to pick out a satisfactory optical drive in the second-hand market. Picking a used optical drive is a two-step process. The first step is to look at the appearance of the optical drive. This step is no different from identifying other hardware. You can only look at some surface problems such as labeling, production date, and degree of wear. These can only give you some basis for inference, and can not judge the quality of this optical drive. At most, you can also open the tray to see if the parts inside are damaged or removed. In contrast, the second step is particularly important, and this step is easier to operate. Prepare a worn-out disc by yourself. When you have selected a second-hand CD-ROM drive, put it in and try it out to see how it reads and corrects errors. If it is a recorder, you can also try its erase function on the spot. Try no problem, this CD-ROM drive will not be too big a problem. Push

5. Floppy drive Used floppy drive is very easy to buy, does not require any special professional skills, just take a floppy disk and try it. It can read and write. If you try to read the disk and format it on the spot and copy and delete files smoothly, it will surely have no major problems. You can rest assured that its reading effect and life may be better than many new floppy drives.

6. When buying CPU and memory , pay attention to whether there is any sanding phenomenon. If it is not polished, look again to see if its nominal frequency is the same as the frequency displayed at startup. If it is not, then the CPU is overclocked. Of course, if conditions permit, it is best to find an expert to be present, in order to prevent a slight mistake and unfortunately lose the trick, at least it can give some kind of deterrence to the adulterer. Pay attention to this when buying memory, and see if the merchant has re-marked the memory modules with lower frequencies to be sold as higher frequency products. The method of identifying it is also very simple. The polishing marks can be clearly seen when the memory particles are placed under the light, because the writing on the surface of the polished memory particles is blurred, dull, and rough. Please be careful during the purchase process. In addition, do nt miss the golden finger. Look at the thickness first and then the degree of wear. If both are bad, then consider it because

It is very likely to have poor contact. Generally speaking, because the second-hand memory has a large number of plugs and plugs, the status of the golden finger is generally not optimistic. Pay attention to the selection when buying.

7. When buying a used case, first remove the side plate of the case, and lift the case diagonally with both hands to see if it is deformed; then look at the steel plate used in the case and the steel plate used as a load-bearing bracket in the case. Thickness; it also depends on whether the more hidden places are cut corners. I have seen some inferior cases before, except for a plastic case, there is nothing in the front, which can't play a role in shielding electromagnetic radiation at all. If you can find some branded second-hand chassis in the market, it is also a good choice. Because the chassis workmanship of most brands of machines is still good.

8. Power supply Buying a second-hand power supply, you can first weigh the weight of the power supply, it is certainly not a good power supply, to ensure that cut corners are cut. Then check to see if it has been disassembled, and then look inside through the cooling holes. If there is a lot of dust in it, then this power supply will definitely take a long time. Use your fingers to dial the power supply fan. Some power supplies have been used for too long, and the fans have stopped rotating. With such a power supply, the consequences can be imagined. Finally, don't forget to look at the actual power of the power supply. Do not judge the rated power of the power supply based on the model of the power supply. It is best to judge based on the maximum current of the various output power sources. The larger the output current, the greater the rated power. Generally, the maximum output current of + 5V multiplied by 10 is used to determine the rated output power of the power supply.