Question Pc displays nothing

[Drogax]

Just bought a new pc but it shows only a black screen when booting,It does work eventually and then no problems appear till booting again,Same problem was on my old pc.I tried plugging out everything,monitor cables are also new Could it be the Power cable? My monitor is a pretty.old 1080p monitor but its light is on and is propely plugged.Can anyone help out?

 

[white.a.drew]

So im confused...? It will display after booted?. Or doesn't boot at all just turns on?. If it does display, probably doesn't support that screen resolution in boot if it doesnt post at all then take the pc back it faulty

 

[Drogax]

The pc starts and I hear and see it working,but displays nothing on the monitor,I dont think the problem is in the new pc because I had the same problem with my old one.I can get it to work tho after like hours of restarting it

 

[scout_03]

list all parts in system even the monitor one and how you connect to it .

 

[Drogax]

CPU:i7 3770k
Gpu:rx480
ram 2x4 kingston ram ddt3
Asrock mobo H61m
Seasonic S12 620 wat psu
Old asus monitor 1680x1050,which I will replace in a couple of days,I connect to it with a Dvi D dual lane cable.