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[wilgo45]

Ok, bought a broken RROD console for hobby working on.  Started out 0020 -3 RROD.  Did some clean up, a reflow of the GPU and straightened out a bent USB prong.

Ran for 10 minutes then became a 0001.  Another slight reflow.  Replaced three Mosfets with brand new ones.

Retried.  No fans got a 0031.  Checked over the recently installed Mosfets; found one with a foot not totally soldered.  Corrected that.

Fresh thermal compound.  Plugged in  - UP and running !!!   YA !!

For only about 45 minutes.  System went back to a 3RROD - 0001.

Other notes:  Power suppy is good.  5 volts at standby.  3.3 v and 1.8 v at the regulators.  I believe this is a Falcon motherboard.  Two of the Mosfets I replaced are ones pointed as being responsible for driving the fans.  I think the power management chip is fine - but not 100% certain of that.

Suggestions please.