"Im not sure"
I'm sure - you should not be messing inside a power supply if you don't know exactly what you're doing.
If it's faulty - capacitors and other components may explode. If you touch a wire in the wrong place it may burn out your power supply and may burn you out too.
There are extremely dangerous voltages, currents and stored charges inside switch mode PSUs.
I suggest you stop what you're doing NOW and dump the faulty PSU - they aren't worth the danger you're exposing yourself to.