Done_Fishin

First .. the edit thing .. THere's a 30 minute restriction on editing a post and I assume like other forums that it also depends upon whether your edit is in time before another posting is made ..

Second , I can't think of anything else to say , I realise that you're not exactly "green" and that you've done a good job of diagnosis on that that PC. Whatever comments I have made so far have been in order to ensure that you didn't waste hard earnt cash on items that might NOT need replacing and ensure that you don't end up asking for help again due to a repeat performance of a problem that didn't get highlighted.
You should already have a very good idea now from previous tests what is good and what is faulty from that mobo. Be prepared though that some faults don't show up immediately, they show up when least expecting it. Most of the components will have been stressed by the PSU.
If you have done any research about component reliability, you may well have heard about the "bathtub effect" relating to life of components.
The bathtub when looked at as cross section has a steep side and a less steep side with gentle slope connecting them. The lifetime of components is said to be something similar when looked at in graph form. Initially a lot of components will fail during manufacturing processes & conformity testing. The "good components will then reach OEM's where some will fail during warranty periods but overall there will be only a few failures during the component lifetime. As the "lifetime" approaches an end there will be a gradual increase in quantities of failures which will signify that the components have finished their usefuil lifespan.

Component failures ... an idea of failure over years of use.

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mfr ........lifecycle........ end of life

When devices have been overworked, damaged by voltage spikes, attacked by static disharge ... it is very difficult to pinpoint at what point thay will fail. Certainly their lifecycle will be impaired and they will not see out their expected lifetime. Sometimes there is a gradual degradation of teh device characteristic like a resistor whose value slowly changes with time, at other times the change is abrupt as a weakened link suddenly decides to either stop functioning or short out. Hence the "it was working fine until I switched off last night" syndrome. Since you are working in the electronics field you must be aware of these things, if only applied to individual components rather than a complete electronic unit.

Good luck with the rest of the repair and if you have any more questions please do come and ask. We're always ready to answer queries and if I don't know the answer or am unavailable , there are a lot of good techs on the forum just waiting to jump in and give a hand