hello guys, having the same problem, wont boot even with only 1 memory installed.
my specs:
mobo: asrock h81 pro btc r2.0
cpu: g1840
ram: kingston ddr3 1333mhz 2x4gb (already check if this memory is compatible with this mobo, yes it is)
ssd intel 180gb
psu: EVGA 600B (bronze psu, right now for 1 gpu, after a while i will buy corsair hx750i)
same problem, wont do anything after start.
im checking this: when u turn on, all componets starts, but they all shutdown for a sec and start all again.
Usually when I have this problem with a computer it is a short (something metal hitting something on the board), a PSU problem (a PSU can turn on and the fan spin but fails under load), or a bad board (I get them bad even brand new). Of course this is assuming you know how to put a computer together and have the processor, ram, ect... set up correctly.
Its worth mentioning that a bad on/off switch will cause this also.
That is where I would start.