How to test N channel mosfets?

Hello, i built a ZVS driver about an year ago. I used to power it from a computer power supply at 12v ,than i changed the power supply to 30v and 10a.With the new power supply it worked as well for about 3 moths. A week ago a wire got burnt and a zenner diode.

I wanted to test the mosfets too but he tests i searched on google didnt work.
Please tell me a good method to see if my mosfets are burnt or not .

iceng4 years ago
Sorry aelias sent you to test a junction transistor.

To test a N MOFET use the simple circuit. 
It will find a shorted or an open broken unit but
not a high voltage breakdown or a high current problem.

aelias364 years ago
Read this: