You got a really bad power supply. Diablotek isn't a good brand, and 250w is not enough.
Last time this happened (I had to get a replacement motherboard from Newegg), it gave me an small 99 in the corner. After calling support and looking it up, I thought I had a bad board, so I sent it back and got a replacement.
I might send back the PSU and get a better one though, after trying it out in a new case with a different power supply tomorrow. Any suggestions for a power supply?
Is the RAM compatible with the system? I know APU's have this issue where you won't get any kind of display/output from your rig if you have compatibility issues.
I looked things up and double checked. I might have done a horrible mistake though and got incompatible RAM. I'm still very nervous...