Make sure the cord is plugged properly
Set the multimeter to DC as to check the direct current voltage of the PSU
There are two methods to plug the probes.
- Connect either red or black probe with the yellow line and black line.
- Plug either red or black probe into the positive and negative terminals of the PSU.
Read the display, if it shows 12V(±0.5v), the PSU is good;
If it shows 0V, the PSU is broken.