[Isabelle Tubbs]

First, when troubleshooting a power supply unit, it is important to recognize what the problem is based on its symptoms. Symptoms can be a computer powering off or rebooting unexpectedly, failing to start, reporting memory errors, etc. It could even be a tangible problem; the system may be overheating, or the computer’s chassis gives an electric shock. Also, buzzing, BIOS beep codes, or other noises can be an indication.

Once it is confirmed that the power supply unit has some sort of issue, it can be helpful to test it to get more information about what is happening. The PSU can be tested using a multimeter or a power supply tester. Additionally, knowing how old the power supply unit is, whether it was handled roughly in the past, and any past electrical interference can give more information.

After figuring out what the issue is, the PSU may need to be replaced. This involves removing the old PSU and then putting in a new one using a screwdriver and the correct equipment to protect against electro-static discharges. Then, verifying that the new PSU is working correctly and documenting findings are the last few steps for troubleshooting the PSU.