Catchy title eh? Well I'm glad it was enough to lure you in.

This thread will consist of user's issues that they may be experiencing with their current PC at home, at work, or any where of that nature.
*If this has been created or one similar, my apologies*
I created this thread because I, myself am expericing an issue on my home PC that has stumped me on a resolution, but I believe I know the issue. Though it is sometimes best to ask for another opinion.
Below will be an example of what a user (I) may ask;
This past weekend as I was working from home on my personal desktop, the machine had randomly powered off with no warning. I expected a surge, but noticed that nothing else in my room or home lost power.
As I went to turn on the machine, it had actually made a pop within the PSU - which then smelled burnt. I immediately knew my PSU had seen it's last day after 7 years in comission. Brand: PC Power & Cooling 550W blah blah...
After this happened I unplugged everything from the rear and waited for the smell to go away. Once it was gone I opened the side panel and looked for any sign of blown/worn capacitors or the alike - nothing was found.
I removed all internal connections that were connected to the PSU except for 2, the 12V 4pin ATX and the 24 pin - just to see what would happened, but of course nothing did.
My next plan of action was to order something on NewEgg that day - I searched and searched until I decided to go with the same brand as previous. PC Power & Cooling Silencer Mk II 950W ..yeah a bit excessive compared to the 550W, but I knew in the future (tax season) I will be upgrading. Why not start now?
After receiving it today in the mail I anxiously waited to leave work to get it put in. Atlast I arrived from worked, removed the other PSU, placed the new one in (after reading the owners manual because I like to), and everything seemed to be working which put a smile on my face, but soon to turn upside down.
1ST Attempt: The machine powered off within 15 seconds - it went through POST, Boot Menu, and when it started to load Windows it
DIDNT power off, but instead both the rear 2 x 80MM fans powered off, screen display went off, and everything remained powered (CPU fan, CD/DVD drive, HDD).
I pressed the Reset - did not reset. I held in the Power - did not power off. I have to flip the switch on the PSU to power off.
2nd Attempt: I doubled check any loose connections - good.
I checked any loose RAM, PCI, PCI-E, SATA - good
I checked for any missing standoffs - good
I looked over the owners manual again - check
Made sure video card had 6pin connected - good
Made sure 12V 4PIN ATX - check
Made sure 24PIN - check
Powerd on - same problem as first attempt. Will boot fine, run for about 15 seconds from any point and then rear fans power off, display will go away and then the rest will remain running.
3rd attempt: Removed RAM - 2 sticks - same issue (besides beeps)
Removed 1 RAM stick at a time - same issue
Removed PCI & PCI-E - same issue
Removed PCI & PCI-E + RAM - same issue
Disconnected HDD, CD/DVD - same issue
Reset the CMOS /Jumper - same issue
Which lead me to remove the 4-pin ATX 12V - the system stays running longer than the 15 seconds without any issue, but of course we know not having this connected doesn't resolve anything..
With just the 4-pin removed I'm able to use the reset switch and hold the power button to shut it off. With it connected I cannot , as mentioned above.
So I'm left to believe that when the PSU went it shorted out the motherboard too.

Help me before I call it quits and buy another new part! Opinions please...this is not a NO Post issue if you read the above.