Question Pc doesnt start, only front led on and slight noise from the power supply, what should i do?

Feb 21, 2021
Hi i built a pc about like two or three weeks ago and now all of a sudden while i was away and it was left on and when i came back i pressed a key on my keyboard to open it from sleep mode and nothing was on in the pc just the front led. I dont know what to do, i tried seeing if it was a problem with the monitor but that doesnt seem to be the problem and i dont know what to do next, please help, this is very new pc i built myself with brand new parts and it was working just fine before i left it.