When buying a computer, people are too concerned about how fast the CPU is, how big the memory capacity is, how fast the speed is, how fast the hard disk capacity and speed are, which is also the most transparent and is the one that most businesses are most willing to promote and brag. But everyone has overlooked a very important issue. The power supply of the PC is the fundamental reason why other components can work normally and stably for a long time. If you don’t have a good power supply, no matter how advanced your computer is and how fast it is, it will inevitably cause conflicts for you every few days. The following is a computer fault removal process. You will know that the inferior power supply is really harmful.
Example: A DIY compatible machine, configured as follows, PIV1.6GCPU, WestJet 80GST7200 hard drive, Gigabyte 8IRX533 motherboard, RMOS256MDDR333 memory
Fault phenomenon: The machine can start normally, but sometimes the hard disk cannot be found during booting, and sometimes the hard disk will be suddenly lost when using the computer. Because this kind of fault is not obvious, the customer didn't care, but later the crashes became more and more frequent, and finally the computer was unusable, so the customer brought the computer to the company and asked for repairs.
troubleshooting:
1. Because no one thought it would be a power problem at the beginning, they were eliminated one by one according to the principle of soft first and hard first and hard, and the minimum system. Because it was an irregular crash, I first suspected that it was a software problem and reinstalled the system, but it still crashed during the operation and detection.
2. After troubleshooting software failures, it is a hardware problem to start thinking about it. First, the minimum system method is used to remove optical drives, floppy drives, modems, network cards, etc., and only basic hardware such as graphics cards, memory, CPU, motherboards, etc. are retained for running and testing, but there is still a crash.
3. At this time, the components that can basically consider the fault may be the CPU or motherboard and memory. So after separately testing the CPU, motherboard and memory, I found that there was a problem with the motherboard. Even if I used other power supplies, CPU, and memory, I still had a crash, and the hard disk could not be found. At this point, it can basically be determined that there is a problem with the IDE interface of this motherboard and the hard disk cannot be recognized.
4. I thought that by the end of this failure, I would replace the new motherboard of the same model for the user and install it. However, after powering on, the hard disk was still not found, and then I felt the seriousness of the problem. This machine is not only a single component that has problems. Because the hard drive is still not found, but it is certain that there is no problem with the new motherboard. So after starting the power supply, I used a multimeter to test the outputs of the switching power supply and found that the voltage of +12V is only 9.98V, while the voltage of +5V is only 4.4V, and the voltage of +3.3V is only 2.68V, which are all far lower than the specified standard voltage. No wonder such a power supply always crashes.
5. Replace a new power supply, after installing the system, power on the tester and install the operating system. Everything is normal and the fault is completely eliminated.
Fault summary:
In fact, the most fundamental reason for this failure is that the motherboard is damaged and frequent crashes are caused by the power failure. However, because the surface of the crash covers up the actual power supply failure, a lot of time should not be spent during the maintenance process. Another point to be noted is that the hard drive of this machine has not been replaced by a new motherboard and power supply for a large area of damage, and in the end it can only be returned to the factory for repair.
At this point, we should also understand that although the value of power supply does not account for much weight in the entire computer, it is not necessary to say much about its importance. In this case of fault repair, due to an unqualified power supply, the motherboard and hard disk were damaged, and several days of repair time were wasted.
After reading the above article, we should all understand that when purchasing a compatible machine, don’t save money on the power supply, otherwise you will lose more than you will get.
Example: A DIY compatible machine, configured as follows, PIV1.6GCPU, WestJet 80GST7200 hard drive, Gigabyte 8IRX533 motherboard, RMOS256MDDR333 memory
Fault phenomenon: The machine can start normally, but sometimes the hard disk cannot be found during booting, and sometimes the hard disk will be suddenly lost when using the computer. Because this kind of fault is not obvious, the customer didn't care, but later the crashes became more and more frequent, and finally the computer was unusable, so the customer brought the computer to the company and asked for repairs.
troubleshooting:
1. Because no one thought it would be a power problem at the beginning, they were eliminated one by one according to the principle of soft first and hard first and hard, and the minimum system. Because it was an irregular crash, I first suspected that it was a software problem and reinstalled the system, but it still crashed during the operation and detection.
2. After troubleshooting software failures, it is a hardware problem to start thinking about it. First, the minimum system method is used to remove optical drives, floppy drives, modems, network cards, etc., and only basic hardware such as graphics cards, memory, CPU, motherboards, etc. are retained for running and testing, but there is still a crash.
3. At this time, the components that can basically consider the fault may be the CPU or motherboard and memory. So after separately testing the CPU, motherboard and memory, I found that there was a problem with the motherboard. Even if I used other power supplies, CPU, and memory, I still had a crash, and the hard disk could not be found. At this point, it can basically be determined that there is a problem with the IDE interface of this motherboard and the hard disk cannot be recognized.
4. I thought that by the end of this failure, I would replace the new motherboard of the same model for the user and install it. However, after powering on, the hard disk was still not found, and then I felt the seriousness of the problem. This machine is not only a single component that has problems. Because the hard drive is still not found, but it is certain that there is no problem with the new motherboard. So after starting the power supply, I used a multimeter to test the outputs of the switching power supply and found that the voltage of +12V is only 9.98V, while the voltage of +5V is only 4.4V, and the voltage of +3.3V is only 2.68V, which are all far lower than the specified standard voltage. No wonder such a power supply always crashes.
5. Replace a new power supply, after installing the system, power on the tester and install the operating system. Everything is normal and the fault is completely eliminated.
Fault summary:
In fact, the most fundamental reason for this failure is that the motherboard is damaged and frequent crashes are caused by the power failure. However, because the surface of the crash covers up the actual power supply failure, a lot of time should not be spent during the maintenance process. Another point to be noted is that the hard drive of this machine has not been replaced by a new motherboard and power supply for a large area of damage, and in the end it can only be returned to the factory for repair.
At this point, we should also understand that although the value of power supply does not account for much weight in the entire computer, it is not necessary to say much about its importance. In this case of fault repair, due to an unqualified power supply, the motherboard and hard disk were damaged, and several days of repair time were wasted.
After reading the above article, we should all understand that when purchasing a compatible machine, don’t save money on the power supply, otherwise you will lose more than you will get.