Question Wont turn on

[Marc_14]

I have a problem on my PC, so sometimes my computer does not display anything but with a couple of press in power and restart button it would turn on but now I did everything and it doesnt display anything, the mobo is on and without any led errors

 

[rgd1101]

full system spec? include make and model of the psu

 

[Marc_14]

full system spec? include make and model of the psu

B150 pro gaming aura
I3-6100
12 gb of ram (1 8gb& 1 4gb)
Gt 1030
Seasonic m12ii 520 w