Check Voltage Switch
Make sure the power supply is set to the correct voltage. Faulty selection of voltage (110V/220V) can lead to malfunction of the power supply and malfunction.
Unusual sounds
If you detect a rattling sound or experience unusually high vibration, the fan inside the power supply may be starting to malfunction. Check fan movement using visual observation. Replacing the power supply is more advisable than trying to replace the fan. An unpleasant buzzing sound whose pitch is fickle can be a sign that the resource is not working when performing different activities.
Testing the Power Supply
Testing the power supply is an easy process. You can use a voltmeter or multitester to measure its output voltage.
If the tester is already prepared, just connect the voltmeter or multimeter probe to the tester cable to measure the voltage. The connector type specifies the appropriate voltage, which should be 12v, 5v, or 3.3v. The measured voltage should be almost equal to the specified value.
Power Supply Replacement
Replacing the power supply is generally easy. The first step is to make sure the power cord has been unplugged (be careful, electricity can cause a shock hazard).
In most tower or desktop cases, you must manually open the case and remove the screws surrounding the power supply from the back.
Next, unplug all power connectors connected to the motherboard or other devices. Some computers have a power supply built into the bracket. To remove the bracket, the power supply must be removed. The process of replacing the power supply or installing a new power supply can be carried out simply by reversing the procedure.