QUOTE(XGO PARADOX @ Jun 3 2012, 07:04 PM)
ok thanks. any help would be greatly appreciated I would be very happy if I could take some parts off a few old junk boards to get this perfectly new one working
0003 - notes a power management issue. Could have a dead or loose Mosfet. Also might have some issue with small resistors or ceramic capacitors. Those could be causing the excess heat felt thru the Southbridge.
I don't think that your drain to A/V shielding ground test is going to show a clear fault. I could be wrong. The way I test Mosfets is to remove. Testing with a meter, both in continuity and diode function. If there is perfect continuity in all the pathways - then Mosfet is dead. Dpak or TO-252 mosfet have a switching function. You also have to charge and release the switch to see if it is working right
I don't suggest using a Heatgun at all. If it is a hardware store heatgun - with the force of its air - it could blown one of those small surface mount devices right off the board.
Another thing could be is that you lost a controller IC.
Another thing is the Southbridge might need reballing. I can do a variety of repair work - even reballing
I'd be open to looking at this for you. Look at it for free even. If I could repair - would shoot you a good deal
Here's some Xbox Scene members for reference - done work for themapollo46 .... juvix8888 ..... ISkate0I
currently doing a job for ZeroprisonerZ
My feeling is the system could be salvaged ... but maybe I'm wrong