Many months ago (almost a year) i had a terrible time with a MSI RMA and ended up with a 790X-G45. While waiting for the RMA process to play out, i used the phenom ll x945 in my AM2+ MB (replaced an Athlon x3). While waiting for the MB to come in, i also purchased a Biostar 880G+ "shell shocker." Now many months later, i am finally getting around to building the system and i cannot get either setup to post. Power comes on but no post.
If you are going to write modern on your PSU you might as well write in the exact maker and model instead. There are a whole bunch of brand new complete garbage PSUs on the market and very few good ones. Modern means pretty much nothing to us.
You won't be able to upload pictures to this website. If you want us to see pictures you first have to find somewhere that will host them, host them there, and then grab the links from them to paste in here. There are tons of places that will host pictures for free out there.
It took the 50+ off the 5 and put it on the 12, and took the 20s value from the 12 and put it on the 5.
It is important because in 2012 almost all the power that a computer uses comes from the 12v line. Next to nothing comes from the 3.3v and 5v lines these days. It is so much the case that we say around here that a rule of thumb is to just multiply whatever it says under 12v by 12 and that's what wattage your PSU is. That would make yours about 12v x 20 = 240w PSU.
Also, its kinda important to note that the efficiency is only 65% on this. All new PSUs are at 80% minimum. What that means to you is the amount of power you are pulling from the wall is going to be much higher than it needs to be in order to supply your parts with the necessary power.
The excess you are pulling that doesn't make it to the components turns into heat. That translates into high power bills and a lot of heat inside the PSU and the PC. Heat makes the operations of electronic components worse.
The one you have may really not cut it. I could see a 240w not having the juice to jump start a 2012 PC. 240w isn't a lot when everything that matters is pulling from it.
I would seriously consider trying to borrow another PSU from somebody and try that in your PC. Either that or just buy a new one right away.
The ePower 550 also have 50As on the 5v line, so you are aware. If it is working, though, I guess it is fine for the short term.
The F0 error code can mean there is a failure with either an expansion card of some kind (like the PC Analyzer card itself) or a problem with the motherboard itself. You can try taking out the battery for 30 min and putting it back in. That could fix the problem if it is a motherboard problem.
Error Code 11 can mean a lot of things depending on which BIOS maker you are talking about. I don't know off the top of my head which BIOS the 880g motherboard is running so I can't really comment on this.
Phoenix seems to be the only maker that ever uses F0, but pretty much all of them use 11 for something and its not the same for any of them.
Anyway, it sounds like you have tested most of the components other than the motherboards in a working system and they all worked in it. Am I understanding this right?
If so, then it is likely that both motherboards are just bad. They both come from motherboard makers that are average at best.
Motherboards have kinda high failure rates in general when looking at all computer parts as a whole, but the best makers (Asus, Gigabyte, and Asrock mostly) do still usually have a pretty good advantage on all the other brands in terms of quality and likelihood to be DOA.