Try to reseat the gpu in another slot. Those codes are for initializing output devices. Are you getting to the bios screen?

sorry i can't see the link. EVERY time mine had 7-9 two short 7 fast (i believe) Mine always did this because the graphics card wasn't seated properly. i just put it in it's mountain mods case and the same thing happened and i thought oh crap i broke it. then i remembered it did this last time because i had the mobo flat (don't do that it's dangerous) on my desk like a retard. try re-seating the gpu and tightening it down and make sure the bus is fully into the slot for a perfect connection. so it was working until you had a power cut huh... well usually when power supplies die nothing happens so it definitely can't be that. Also do not have the ram clocked that high on the mobo. i know the ram can handle it but the sr2 doesn't like above 1333mhz and 1.65v i believe after that it gets angry and doesn't post. Also! one other thing to try to do. reset the bios and see if that helps any. Also if you haven't just try one piece of memory in each slot. unhook all the hard drives and anything else just so you can see if it will post. that's why i built mine on the desk because i wanted to test each indiviual component. it's dangerous though unless you have a way to elevate the motherboard. Let us know what you find. it really sounds like something simple.

hmmm hate to say it but i think something got fried. well it may seem really odd but try another power supply if you have one. who knows. i had a guy who bought a power supply from me because his dog gnawed the cored to the surge protector and i guess it crossed wires and fried his power supply. it would come on but nothing would post. if you have one try another power supply again with the bare minimum just to get it to post. i have a hunch that could be it. Good luck and report back hope to hear good news.