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There are lot of things that can go wrong with electronics and most of the time, the electronics part is impossible to test at home. If I would look for a fault that causes computer snowlines, I would look for a hardware fault. It simply makes sense.
The vast majority of faults are related to the media. This can be a hard drive fault or a file system infection caused by a virus. So, if we concentrate our focus on media devices, then is high probable that we will stumble upon on a fault even if we are not experienced enough.
There is a technique for computer troubleshooting that recommends Apple. Independent technicians use their own techniques based on their experience in a computer Repair Company. And, many technicians are usually just guessing most of the time. This is the reality.
My technique is to first look for common faults. I do not use quick fixes like Apple does because I believe if I do, I would then probably overlook the cause of the problem.
The hard drive check I use is with GSmartControl.
This takes about two minutes. I check the computer for viruses with Malware Bytes. This will take about two hours and it depends on how much data is there. Computer diagnostic processes usually take a significant amount of time.
Next, it is probably a good idea to check the power supply or the power adaptor if you are fixing a laptop. Sometimes, the power supply can causes troubles on desktops computers, even if they seem to work properly and the computer boots properly.
After that, the second step is to check the motherboard visually to see if there is something that looks different or suspicious. At the same time, check the motherboard temperature.
You can also check this with your fingers. There is no danger of high electricity on the motherboard. I do not recommend checking the power supply temperature or even touching it as there is a high voltage coming through. It is better to observe visually for components that have changed color, appear deformed, or have damaged casing.
From my experience, if a computer is slow, there can be any hardware fault or software fault. I do not have anything against the Windows Vista operating system but it simply can’t run on 1 GB of RAM. Even 2 GB of RAM is not enough for it to run properly. So, if you do have Windows Vista, it is better is to upgrade your memory first or even to upgrade Windows Vista to Windows 7 or Windows 8.
If there is no fault still discovered, you can then test the memory. Memtest is a very good test.
If there are no faults found, my advice is to put the system through a stress test. The OCCT or Prime95 are good for this purpose. The main idea here is to put the system under pressure to make it fail again. If there are any hardware faults, stress tests will make it fail again.
As you can see, there is a lot of diagnostic procedures involved here which are necessary. There are even more procedures in order to diagnose the electronics part of a computer using oscilloscopes and multimeters.
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