A Checklist for Used Computers
It is very key to check a used personal thoroughly before buying it as it might lead to problems in the future. A hard drive will not show any outward signs but might be deteriorating. The same way the needle can suddenly slip and can cause scratches on the disc ultimately leading to memory loss as used personal can fail any time. If they are checked, the faults which might occur can be known. Let us 1st see the possible faults which might occur while purchasing a used computer.
Hard disk failures can happen due to heavy wear and tear over a period of time. The read and write heads of a hard disk are used to retrieve or recode data stored on the hard disk with the help of a disk platter rotating at a high speed. Over a period of time the risk of failure or malfunction of disk increases. Faulty sectors of the hard disks can be found out only if a full surface scan is done on the used computer. The scanning time depends on the capacity and size of the hard disk of the used computer. Many skip this procedure due to the time consuming process of scanning the entire disk and end up purchasing a used personal with a faulty sector.
Monitors require to be checked for any faults. The malfunctioning of a monitor is called a “dry joint” which results in the monitor not working after getting warmed. This can be checked only if the monitor is made to work for at least 20 to 30 mins after switching on the computer.
Next is to look for any possibilities of the central processing unit getting freezed. Normally all the central processing units have a fan and heat sink for keeping the unit cool. Over a period of time the fans might not work properly due to the accumulation of dust and dirt resulting in over heating of the central processing unit and even leading to stopping from functioning. While buying a used personal the fan needs to be checked and if any abnormal sound is heard, it is not good for purchase.
The used personal might have a higher possibility of getting crashed and freezed due to the usage of the operating system for a good number of years. There might be a cache or RAM fault due to the over exposure leading to loss of data. To increase the performance of the personal and to avoid crashing, the operating system of the used personal can be reinstalled with a untried operating system or a fresh one.
While checking the used personal for any faults, it is good to disconnect the network connection if any present before performing the tests. Also it is advisable to check the drives like the CD or DVD by opening and closing them and also playing something on the drives to see how they work. Monitors of the used personal can be checked for the resolution and brightness by trying different options of color, settings and so on. To check the hard disk size the CMOS setup can be gone through and to verify the speed of the processor, cache and RAM the pause button is pressed when it appears on the screen during the booting process. To check the booting process, the personal can be turned on and off a few times and seen how it responds. Checking ought be done to see if all the passwords are erased before purchasing a used computer.
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