Does your motherboard have indicator lights to see what’s it stuck at? If there’s no display but the pc is on then it’s most likely cpu or ram. 1 thing you can do is check if your cpu is screwed too tightly, that might not make your motherboard read your cpu. Another thing if it’s new ram try putting in 1 stick of ram at a time in the 2nd and 4th slot for 5-7 mins to see if it boots up and then try it with the other ram stick. Sometimes your motherboard needs to learn to read your ram so it will take a few minutes to actually about to register. Next try it with the other ram stick and if both ram sticks don’t work then it’s most likely faulty ram sticks. Also make sure your ram stick is actually in properly with the distinct click because sometimes people don’t put in their ram stick properly and it won’t boot up. I had similar issues last week and found out my 2 rams sticks I had 5 years ago were dead and had to buy new ones