Computer wont start up

saintssuperstar · 15 Dec 2007 at 12:48

My pc wont start up at all. There seems to be power going to the mobo tho as the green light appears when its connected to the mains. I changed the psu with a spare one and it still does not work. Maybe its the mobo? if it is its the second one that has gone this year. Any ideas guys?

AndyOcUK · 15 Dec 2007 at 12:53

try one stick of RAM in slot 3 (3rd away from the CPU socket) and reset the CMOS.

saintssuperstar · 15 Dec 2007 at 12:54

to reset the cmos is that when you take the battery out?

Delvis · 15 Dec 2007 at 12:55

Yep, one way of doing it

saintssuperstar · 15 Dec 2007 at 13:00

Jus tried that and it didn't fire up

Delvis · 15 Dec 2007 at 13:01

Get the system to the barebones...ie motheroboard, cpu, ram, and graphics card if you don't have onboard...Re-seat everything including the power, and try it then.

saintssuperstar · 15 Dec 2007 at 13:08

still a no luck

Delvis · 15 Dec 2007 at 13:10

Could try doing it all out of the case also, Did you say you tried a different psu?

Try booting with just the Cpu and motherboard, see if it atleast turns on.

saintssuperstar · 15 Dec 2007 at 13:18

Yeah mate tried it with 2 different psu that work. Just tried cpu and mobo and it didnt boot.

DeadMan · 15 Dec 2007 at 13:18

Sounds like the 12v CPU connector is not connected!

saintssuperstar · 15 Dec 2007 at 13:22

All the power cables are hooked up :? and this problem just occured one day after I shut it down, not after upgrading it or messing around with the connections ill check anyway

The power cable connecting to the mobo does not fit all the pins, it is like 2 pins smaller i think. but its the same on my bros pc and he hasnt got any problems

DeadMan · 15 Dec 2007 at 13:28

1, Remove all cables from motherboard
2, remove all components from motherboard, CPU, Ram etc..
3, reseat CPU, Heatsink / fan and ram
4, plug in power cables only.
5, start PC.

DeadMan

saintssuperstar · 15 Dec 2007 at 13:33

I got to head into town for the next couple of hours so i'll get back to you when i get in. Thanks a lot for the help so far guys really appreciated.

Delvis · 15 Dec 2007 at 14:23

Just tried cpu and mobo and it didnt boot.

Meaning it didn't turn on at all or?

AndyOcUK · 15 Dec 2007 at 16:33

It will be a lot easier for us all to help you if you can list the FULL spec with as much detail as possible....especially PSU mate

saintssuperstar · 16 Dec 2007 at 12:32

yeah it didnt turn on at all. Also tried what deadman suggest and it still didnt turn on.

Specs
300watt psu (had it with the pc when i baught it quite old)
Asus A8V-VM 939 motherboard (new this year) my second mobo this year
Geforce 7600gt fairly new
Amd athalon processor (new this year)
1 gig ram, 2x 256 kingston and 1x geil value ram

saintssuperstar · 16 Dec 2007 at 14:05

bump still not turning on :s

Wiggins · 16 Dec 2007 at 14:40

Were the standoffs added to the backplate before you mounted the motherboard?

saintssuperstar · 16 Dec 2007 at 14:41

standoffs? are they what the screws go into on the case?????

Wiggins · 16 Dec 2007 at 14:43

You screw them into the backplate first so that when you put the motherboard on it does not touch any metal. If it does then there is a high chance of short circuiting the board.