How to check SMPS??

Solution:-

Step 1:- Turn off the computer completely.

Step 2:-  Remove all the connections that are connected to motherboard from SMPS.

Step 3:- Use a paper clip and bend it in U shape.

Step 4:- Locate green and black wire, note that there will be one green wire and many black wires. You can select any black wire you want.

Step 5:- Connect the power cable in SMPS. 

Step 6:- If it is working, the SMPS fan will spin.