Welcome to the forums, newcomer!
We're going to need a little more info. When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model.
You might want to also include everything you've done in order to troubleshoot the system. If you're using parts to rule out the one on the existing being faulty or failing, include the makes and models of them as well.