loedown wrote:

The clue is warming up

do you have pre driver transistors for the MOSFETS?

There is a small 8 pin IC that looks like it is driving the gate on the
MOSFET... would heat cause this IC to work? - I will try the freeze test as
soon as I can get the board back out - we were forced to put it back in use
temporarly...

I would imagine diode test on the IC when removed should let me know if
there is a short or too much resistance...

the other way to find out is to let it warm up and hit it with freezer
spray, various components, probably driver transistors and caps


Paul

Thanks for the tip on the spray freeze... I was thinking about using canned
air to freeze the components...

-kj