New built PC problem diagnosing

The_Legend131

Reputable
Jul 13, 2014
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4,530
Hi,

So I just built my first pc, which has no OS installed, specs are as follows:

Athlon 5350
gigabyte am1m-s2h motherboard
4GB Ram
Seagate 250Gb
cIT 500W PSU

So when I turned this on for the first time, the motherboard (gigabyte) logo flashed up for a second, before the screen returned to black. I have tried turning the system on and off multiple times, with a repeat of this, or the "no input detected" sign going away, but the screen remaining black.

So I bought a motherboard speaker to listen to the beep codes, but there is just one, short beep, which indicates that the system has booted successfully.

What could be the problem?