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Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
No worries, also a mosfet can be tested in circuit. If you find it to be shorted take it out to check again.
Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
on the IRFP9240 when I put the negative on the drain and positive on the source I get 0.L when testing in ohm mode
That is what I expected, the 500K Ohms was the reading of the body Diode of the MOSFET when you have Red on the Drain and Black on the Source, so when you reverse the probe, the diode is in reverse bias so the meter show OL -Over range. look at the spec sheet of the MOSFET.
99% of the POWER MOSFET failure will be shorted (Low Ohms) beteen Source and Drain pin.
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