I need help with my faulty computer please!

PC specs-

Motherboard- Pro Z690-A WIFI DDR5

CPU- i9-12900K LGA 1700

GPU- Gigabyte GeForce RTX 4070

Memory- G.Skill Trident Z5 RGB Series 32GB (2 x 16GB) DDR5 6000

Storage- Samsung 980 pro SSD 1Tb

Hey I'm having a problem with my computer that I built. When i first built it, it worked for about 4 months the suddenly shut off one day and wouldn't turn back on. So i got a new PSU (thinking my old one died or something), and once i plugged it in everything was set up i turned my computer on and it did turn on. All my lights came on and i got no debug lights, but i didnt get a signal on my monitors. I tried every HDMI port and Display port but nothing gave me a signal. So i shut my computer down too see what was wrong and now it wont turn back on. Im not sure what the problem is, I would appreciate some help.

:)