New System Problem

Teki187 · 2 Jan 2009 at 18:07

Just installed a new PSU and the computer seems to boot and randomly after 1-5 secs restarts.

The system is:

C2D E6400
1gb GTX 280
4x 1gb Ballistix
XFI Gamer
2x250gb Seagates

Now more heads are better then one, so i was hoping for some help please.

I'm thinking short circuit with the possibility that the CPU might not be right.

Teki187 · 2 Jan 2009 at 18:18

95thrifles said:
What do you mean?
It keeps restarting over and over again and wont boot?
Or it does this just once? As in your fans and stuff spin for a second then stop then restart?
Which is it sorry?

Ah sorry, well basically the lights on the motherboard flash up, the diagnostic leds show up and the fans spin, hard drives, graphics card and so on. But it then just stops like someone's turned the power off, then turns it self back on.

Teki187 · 2 Jan 2009 at 18:23

Add: it does this continuously so it never actually boots fully

Teki187 · 2 Jan 2009 at 18:28

Yes, I have checked all the connectors etc. It's a Corsair TX750w PSU.

Teki187 · 2 Jan 2009 at 18:33

Just tried something: when I take processor out, the system hangs and does not re-set. When I put the processor back in, I get the re-boot problem.

Teki187 · 2 Jan 2009 at 18:35

I'm sure it's not the PSU as I had the same problem with my old PSU ...

Teki187 · 2 Jan 2009 at 19:02

Well sadly i have no mates with a 775 who are willing to allow me to test.

The cpu ran fine until i changed the motherboard, i had it previously at 3ghz (1.3v).

The motherboard is a Gigabyte GA-EP45-DS4 (http://www.overclockers.co.uk/showp...P45 (Socket 775) PCI-Express DDR2 Motherboard)

I've just removed the motherboard from the case and tested it on a magazine to make sure nothing was touching the motherboard and i still get the problem.

Going to try my old motherboard to see if its that.

Teki187 · 2 Jan 2009 at 19:19

Just tried my old motherboard, this time it doesnt seem to post.

With the cpu in, the computer just hangs and the graphics card just spins at 50% and nothing comes on the screen.

Without the cpu, the graphics card doesn't even spin.

Teki187 · 2 Jan 2009 at 19:36

95thrifles said:
to rule out RAM, try removing all but one stick, and try 2 different sticks one at a time see if it'll post, if it is RAM its unlikely more than 1 stick has gone

Just tried all sticks in all 4 slots, still the same problem.

Just removed the battery and that hasn't done anything.

Teki187 · 2 Jan 2009 at 19:53

95thrifles said:
well it seems like youve managed to rule out everything but your CPU, but before buying a new one Id beg someone to lend you theres for 2 mins so you can check - you dont want to spend money on a new one to find it isnt CPU

Well the motherboard has these diagnostic leds that are meant to tell you if a component is functioning abnormally, when i first turn on the system, there is a blue led on near the cpu for 2 secs, it turns off and then just before the system reboots, it comes back on.

Problem is in the manual there is nothing to say what colour light or so on indicates a dodgy component.

Teki187 · 2 Jan 2009 at 20:20

95thrifles said:
Ive had a quick look in the manual online and it says there are different LED's for different components, you can see it yourself here, go to section 1-8, basically there should be small lettering next to the LED which tells you which component it is
CP_LED, DIMM_LED etc

It's the CPU_LED light that is the case, but I can't see where it says what the light should be doing or what colour it should be (i.e. should it stay on, should it just flash, should it be blue or red etc). The CPU_LED light flashes on for a couple of seconds, then it goes off, and then just before it reboots it comes back on again before the system dies.

Teki187 · 3 Jan 2009 at 09:30

TerminatorUK said:
Might be a RAM issue (especially as you are using 4 sticks).

Try booting with one stick of RAM and upping the memory voltage to the maximum recommended for your RAM modules (if you can get that far to the BIOS)

If it boots, try adding one more module, boot, see if it works and then rinse/repeat for the other ones.

If it fails to work after this, it could be a PSU issue which is best tested by borrowing one from a friend if possible.

Thanks but the system doesn't even load into the bios nor to the point where the bios loads.

The memory I've tested without any sticks in and all 4 sticks in random slots.

Teki187 · 3 Jan 2009 at 09:30

Kennysevenfold said:
tried poping in the old psu and testing it.?

might be a faulty psu

Tried that last night and i think i've blown that one, internal fan doesnt spin, case fans + cpu fan doesn't spin, but the lights on the motherboard come on, so i'm guessing i killed it.

Teki187 · 3 Jan 2009 at 10:30

95thrifles said:
So is it just the CPU diagnostic LED which comes on?
Or do they all come on?

Well its just the CPU_LED, but like i said before, it doesn't come on and stay on, like the light does without a cpu in the motherboard, it just comes on 2 secs later it goes off, then comes back on before it restarts.

Teki187 · 3 Jan 2009 at 12:34

95thrifles said:
Well I think that would signify your CPU has had it, it may go off because its trying to restart itself, and after 2 attempts the m/b gives up and quits itself, but I think its safe to say if your diagnostic CPU LED is coming on, and no others are, and weve ruled out pretty much everything else anyway it points to your CPU having given up the ghost. Go for a new one, either E7300 or one of the E8x00 depending on what you can afford

Appreciate all the help you've been offering mate.

I think i'll be ordering a Q6600 on Sunday.

ConnectionFX said:
If you can get too Northampton ill be happy for you to test your CPU in my rig.

Best i can offer but im abit far from Nottingham

And thank you also, but sadly it'll be too far a journey