Taking The Concerns Out Of To Investing In A Used Computer
Buying a used computer is a perfect way to save money provided you are cautious about which computer you purchase. The primary concern with purchasing used computer is that shortly after you get it all set up and running it crashes. Fortunately there are some simple steps you can take to reduce the risk a used computer being a lemon. Buying a used PC is also a great way to get a machine loaded with upgrades such as a USB TV tuner for very little or for free.
The hard drive is very important and probably the last component of a computer that you would want to fail. The mechanical components of a hard drive are virtually impossible to inspect before you a buy a computer. Because of this it can be pretty hard to predict if hard drive in a computer is on the verge of failure. There are a number of mechanical components in hard drives that can fail. Some hard drive failure is due to mechanical failure others are due to ordinary wear and tear. The read and write heads of a hard disk are used to retrieve and write data to a hard disk that is rotating at a high speed. Over a time the risk of failure or malfunction of a hard disk increases.
Some potential hard disk failures can be detected by performing a full system scan. Certain bad disk sectors are easily detected and repaired by performing a full system scan. The scanning time depends on the capacity and size of the hard disk of the used computer. Performing a disc scan is not difficult but many skip it because it can take a few hours to do a full scan. It is highly recommended that a full system scan be performed before buying a used computer.
Inspecting the CPU is also very important before buying a used computer. CPUs can freeze completely or cease to operate properly. The primary cause of CPUs freezing is overheating. CPUs have a fan and heat sink to keep the unit cool but the fan can wear out or not function properly due to the accumulation of dust and dirt which can result in the CPU overheating. It is fairly easy to check if the fan is functioning properly by listening to it and looking for excessive dust. A properly functioning fan should be a consistent, low hum. A fan that is not working properly will often emit an uneven sound in volume or tone.
If you are buying a monitor it should have crisp colors and be bright. Dull or muted colors are signs that a monitor is near the end of its life. A fluttering picture and any easily discernible noise are worthy of concern as well. The condition of a monitor is even more crucial if the computer has a USB digital TV tuner.
A computers operating system should be checked as well. Over time operating systems can slow down due to programs being added and deleted from the system. The registry can also become cluttered with deleted programs. Unless you are knowledgeable with such things the best way to test the operating system is reboot the system a few times. A computer that takes an excessive amount of time to boot up can be a sign of an operating system that needs attention. Probably the best option after you purchase the computer is, if you are comfortable with it, to reformat the hard drive and reload the operating system and all drivers and programs.
All other hardware should also be checked. For instance, CD and DVD drives should open and shut easily and your should be able to read and write data to a disk. Other items that should be inspected are the USB TV tuner card, mouse and keyboard.
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