PC - Light on GPU and case start, short beep and then goes off

I built my PC about a year ago. I recently moved and had to undo everything. I had to buy a new power supply to correct the voltage and everything. It’s been working fine, until I stopped using it for a month. I’ve changed nothing but the monitor and I’ve only now had these problems.
When I click the on button, the lights on my case and GPU turn on, however they go off after a quick second. My PSU fan starts to spin, but it stops once the lights go off. Both my CPU and GPU fans do not spin at all. There is a short beep that my mother board gives when I click the power button (Maybe that means something?)
 
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