Boots one time then doesn’t next time

[Aisuru]

Basically my pc didn’t display anything so I re seated the ram - didn’t work I thought the mobo was fried but then it was still outputting signal so that’s a no re tried the ram hours later it worked! So then I played for 1 hour then turned it off again hours later I couldn’t sleep so I decided to turn it on - didn’t work so I gave up the next day my second time pressing the power button it worked then it won’t work again I have no idea what’s happening anymore I’m seriously one of the most confused man on the planet rn
Anyone have an idea on what’s going on?

P.S if I get it to boot I’m thinking to not close the pc anymore lul

 

[rocktalkrock]

1. Is it possible your computer uses a mechanical hard drive that may be failing?
2. Can you list the parts in your system?

 

[finitekosmos]

I'd also look at the USB devices you have connected to the computer. In particular USB 2 devices connected to USB 3 ports. USB 2 devices can leak power back to the port causing a lot of random hangs and boot failures. Disconnect your USB devices, leave only the mouse and keyboard connected and if they are USB 2 devices connect them to the USB 2 Ports on your computer.

Also can you please list the specifications of your computer it will help if you need further help

 

[Aisuru]

Specs:
i5 3450
8GB Ram (currently 4 BG cuz I removed the other stick)
My HDD Idk about it’s healt I’ll check HD sentinel

So basically I removed the ram from the pc so it had no ram what so ever then I put it back again then disconnected my mice from the USB port but my keyboard was still connected so it worked and I’m scared to turn it off again :3