Can I repair a power supply

[verbakalim]

If you want to repair a power supply, you must first disconnect yourself from the mains.
The problem is not solved by parts taken from the old power supply and installed.
Next, you need to purchase a set of components that can cause problems with this power supply.
You need to check whether the voltage values of all outputs of this power supply are normal.
If you plug it into the motherboard immediately after the power supply is turned on, you will have bigger problems.
You need to measure all the voltages of the power supply very precisely.
You should check the values as follows.
+3.3 volt
+5 volts
+5 volts
+12 volts
-12 volt