Troubleshooting Computer Power Supply


Computer power supply is an electronic component that supplies power to the computer system and the peripheral devices that are attached to it. It converts the mains alternating current to a low-voltage supply of direct current to be utilized by the internal components.


Different issues that can come in power supply of your PC and tips to resolve such issues are discussed over here.




  • Issues with power supply unit

  • Diagnosing power supply unit problem

  • Taking care of the power supply unit for a long life



Issues with power supply unit



Short circuiting is a common problem that can lead to malfunctioning of the power supply unit. This can occur in a variety of manners. The user might have bought a PC with a low-voltage rating as 300V and connected to a 500V power unit. The extra power voltage can lead to the short-circuiting of the power supply unit. Power surges are a common phenomenon, when a user does not have a UPS in such a case; there is likelihood that the PSU can be short circuited. Power supply connections to the motherboard can also be an issue. If there is a wrong connection, the PC may not come on. The power connection cable from the mains power supply can also be malfunctioning. The power supply fun failure can also lead to malfunctioning of the whole power supply unit.



Diagnosing power supply unit problem



The initial procedure is to determine whether or not the power comes on. There are ways in which the PC user can determine whether the power is on i.e. by monitoring to see if the fan is turning on or not or checking to see if the drives motors are spinning up or not. In addition they can check to see if the lights little lights on the front panel of the System Unit Case or if there is an initialization by hear any beeps? The user should note whether the system case is hot and in case of a shock, then he needs to immediately pull of the plug immediately. A breeze from the power supply can also act as an indicator to know if it has actually powered on.


The user should also check the correct voltage rating that the power supply unit utilizes and adjusts the mains supply. Using a different power cable from the mains can help eliminate the issue of faulty power cable. Once the power supply does not come on the user needs to check for the live power source. The power source can be verified by trying with a different electronic component to see if it is working.



Taking care of the power supply unit for a long life


Avoid using the computer system for long hours in the day as this may cause some electronic components of the power supply unit to fail. Keeping the computer system in a well air conditioned room can help reduce the problems of overheating that may lead to power supply unit failure.




iYogi's Digital Home Plan

We offer comprehensive support for your PC, connected devices, peripherals and over 500 software applications including:

  • Diagnostic & repair for your technologies.
  • Troubleshooting software errors.
  • Updating drivers and security to protect against online threats.
  • Connecting to the Internet, devices and peripherals.
  • Optimizing your PC's speed and performance.

Enjoy instant and unlimited access to great tech support, all year around. We promise the lowest wait-time and the highest resolution rate in the industry. The experienced and skilled technicians of iYogi are on call 24x7 to provide you support for resolving any tech issue that you are struggling with.

iYogi’s tech experts can provide support for all the major brands of laptops, like Dell, ASUS, Toshiba, Compaq, Lenovo, Dell, etc.