mosfet replacement for motherboard

[stoner]

Have a question for the experts. I have a gigibyte mothboard GA-7VAX-A Rev 1.0 and am having problems. Removed all the caps and checked, they are fine (since put back on). Have a small brown spot on the back side under the Mosfet (4 of them). They are NEC K3405 (repalcemnts from this forum are the 2SK3405). Wife says just to junk the board and move on, but it and I have fond memories and now it is just a matter of principle(yes I am thick headed). I have an old motherboard that the caps are gone bad on and can rob the Mosfets from that. They are NEC K3296; question: can I use these to replace the NEC K3405(2SK3405) on the gigibyte board that I believe are gone bad (i removed them and checked them with a DMM and they are all differnt readings). Awaiting replies from the experts (i know enough to be dangerous)

Thanks much
Stoner

[shadow]

Re: mosfet replacement for motherboard

Unfortunately I do not know. However I do know for a fact that others on the forum can give you good advice!

[starfury1]

Re: mosfet replacement for motherboard

Hi Welcome
There are a few posts around here dealing with this (search mosfet)

You would need to check the spec on the Mosfets (off hand, No idea)

I think from memory you may have to replace the lot or maybe pair
I don't think (from memory) its a good idea to mix different Mosfets in the VRM circuit.
(Ditto Caps)
(you may get away with one of the same type..I think)

As to worth saving?
If you got the time skill and use...why not

As Shadow said there are others much more familiar with this thing here
(I just know there are posts on your type of question around here)

Cheers