Just finished building a PC, when I click the on button the fans spin, light up but it...

[Stathis Moshis]

Just finished building a PC, when I click the on button the fans spin, light up but it doesn't make that click sound that confirms the PC is working.

Any ideas what I've done wrong?
Possibly Ive done something wrong when installing the CPU?

 

[Sam Curry]

Does it post? Like can you get into the bios?

 

[Lewis Kiltie]

Try reseting your cmos