installed AIO watercooler, now my computer won't boot.

I don't even know how to start this thread, but the title pretty much says it all, what did I do wrong??!
The cooler is installed properly mind you; I have no idea... The only thing that's changed is my CPU cooler lol
Anyways, when I turn the computer on it would remain on black screen (not on).

**Things I've tried**

- I've tried booting the computer with none of my USB devices connected, no luck.

Hi I would start by reseating all the connections in the case. might of knocked one loose when installing the cooler.

I had just checked all the connections just now, no luck. What on earth did I do...

are the case fans running is the cooler running?

The cooler is indeed running, and yes the computer is on the case fans are running etc.
I forgot to mention that the computer just turned off by itself and turned back on, this is the 2nd time it has happened.
After it shuts off and turns back on it stays on. What have I done...

hi remove the graphics card and try the onboard graphics

oscer1 said:

hi remove the graphics card and try the onboard graphics

way ahead of you, still no luck.

Okay, so the pattern for the computer turning off is not random, it will only do it 1-2 minutes after I turn it on, then after it turns back on it'll remain on.

how about trying just one stick of ram. look at manual for one stick of ram position.