Question Computer doens't show signs of getting any power | New parts|

Dec 10, 2019
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Hello everyone,

I had some trouble with my PC, since it was rebooting periodically, or not being able to boot because it would turn of while it was booting up. I decided to change the power supply, which fixed it for a while, but after a week or so, it went back to doing the same, and it got worse. I got it checked and they told me it would most likely be because of the motherboard. I ordered a new one, and I installed. It booted up and started updating. I left the room for 15 mins, came back to the PC and it just wouldn't turn on, at all. The fans and cooler give me an indication that it gets a little kick, but after the first couple attempts it just won't show any signs of turning on. I made sure everything is properly seated, None of the parts were damaged, and I am honestly out of ideas as to what it could be the problem.
Keep in mind this an old machine I am trying to fix for my father. It's not bad at all, but it's outdated for sure.

Thank you in advance.
 
full system spec? include make and model of the psu
what new what old?
I will do my best to list the specs:
Motherboard ( new) - gigabyte ga-g41mt-s2p ddr3
PSU (new)- Corsair VS650
CPU - Intel Core 2 Quad Processor Q8300 2.5Ghz
RAM- x2 Ballistix ddr3 4GB
GPU- AMD Radeon R7 200 series
Hard drive(new) - Kingston 250GB SSD