Fix a computer that won't turn on - Episode 1 - remove ram

So I came back from a trip and after 3 days of not turning on my computer, I could not turn it on anymore. It will power on for a split second after I press the on button, but turn itself off again very quickly. It will repeat this process a few times, like it's trying to wake up from a bad nightmare, but it will turn back off eventually. So how do I fix this problem? Follow the journey!

[TheAcademyofGeekery]

When I changed the watercooling in my PC recently, the exact same thing happened to me (I was getting the brief on-and-off that you were getting at the start of this video). I fiddled around with everything for ages, avoiding touching my cooling & CPU because I didn't want to have to clean off the thermal paste and use more, but I ended up having to. It turns out, since I'd taken my CPU out before putting the new cooling on, the tiniest piece of dust had gotten behind it when it was re-seated, so one of the pins wasn't fully connecting. I blew it off, re-seated again, and it thankfully booted. Crisis averted