Computer shows white screen and turns off after a minute

[TarekY]

Hey guys ,

So I've just replaced my old noisy power supply yesterday , after that i tried running my pc to test it ,for the first few tries it turned on and off randomly with no out put on the screen ,then I turned it off and checked everything thing , I forgot to put the 4 pin cpu cable aside so it was jamming the cpu fan , checked on everything and tried running it again.

Now it runs for about a minute outputting a white screen with all the fans running and even the hard drive led flashing every once in a while then it restarts .

What I've tried so far : 

1-putting back the old power supply = no luck

2-putting my vga cable into the motherboard socket = no luck 

3-removing my gpu and doing #2 = no luck 

so I'm going to a Shop in a few hours to check but I just wanted to have an idea about What's Wrong

Note that I'm using an old crt monitor with a vga cable if that would help

 

Edit : 

So apparently I just needed to reseat the ram ...... 

Thanks to everyone that replied !

[tbroadwater2010]

You may want to pull the CMOS battery and replace it after 30 seconds and see if that works. Probably isnt a bad idea to try anyway!

[TarekY]

Just now, tbroadwater2010 said:

You may want to pull the CMOS battery and replace it after 30 seconds and see if that works. Probably isnt a bad idea to try anyway!

Been there ,done that 

Thanks for replying anyway !

Edited February 10, 2016 by TarekY
Being a nice guy

[Peter Vaughan Truslow]

18 minutes ago, TarekY said:

<snip>

 

try booting with each stick of RAM independently

[TarekY]

Just now, TriceraFLOPS said:

 

try booting with each stick of RAM independently

To my surprise , that worked ! 

So it's a ram problem ?

 

[Peter Vaughan Truslow]

2 minutes ago, TarekY said:

To my surprise , that worked ! 

So it's a ram problem ?

 

determine which stick it doesn't boot with

if they all work, determine which slot or slots don't work.

chances are, it will be one of the 2. if you have dead sticks, RMA ram, usuallythey carry a very long warranty that isn't a hassle to deal with.

if it's a dead slot, could be the motherboard or a dead/wonky channel on the CPU's memory controler. process of elimination until you find the specific culprit

[TarekY]

Just now, TriceraFLOPS said:

determine which stick it doesn't boot with

if they all work, determine which slot or slots don't work.

chances are, it will be one of the 2. if you have dead sticks, RMA ram, usuallythey carry a very long warranty that isn't a hassle to deal with.

if it's a dead slot, could be the motherboard or a dead/wonky channel on the CPU's memory controler. process of elimination until you find the specific culprit

It seems that individually they both work .... testing right now

[Peter Vaughan Truslow]

try both in the same memory channel. both on the right 2, and then both on the left 2 slots.

if this works, run in the same channel. technically it will cut your memory bandwidth in half, but usually you already have more than you need, and i'd be suprised if it made any noticable impact on real world performance

Good Luck!

[TarekY]

So apparently I just needed to reseat the ram ...... 

Thanks to everyone that replied