Computer will not boot

Ornatus

Ornatus

Ornatus

Associate
Joined
17 Mar 2009
Posts
121
Hi there, im currently having a problem with me computer atm, when i switch the computer on the system will briefly try to go thru the boot process but after maybe a few seconds it will switch off and automatically try again, by looking at the check process the motherboard does will booting a red led will turn on indicating that there is a problem with the cpu.

My system was bought from Overclockers which comprised of a overclocked bundle which included a i5-760, Asus P7P55D-E and corsair xms memory. As above the computer tries to boot but fails at the cpu but after 5 or so attempts it will boot up and everything is fine for 5-10 mins and then it will crash and we restart with the fast crashes at the cpu check stage, the fact that it can boot up and operate for a small time indicates to me that the cpu is ok but there might be a problem with either my power supply which i might add is getting on abit or there is a problem with the power management on the motherboard.

I was told by my next door neighbor that we had a power surge the other night while i would have been sleeping so maybe this could be the cause but lets just say it didnt come from a reliable source so im still looking at all options, any help or insights would be greatly appreciated before i take this to a shop and getting ripped off for what might be a simple and cheap fix, regards.

P.S I live in Stoke, do overclockers have a maintenance shop?
 
Tried resetting the CMOS by both moving the jumper and moving the jumper and removal of the battery, tbh i dont think it ever reaches loading of the bios, it literally flicks on for 1 second and then flicks off then a few seconds pass by and it tries to restart but running into the same issue.
 
That was the first thing i did, tbh i thought the overclock that OCUK had done had finally blown the CPU after 2 years of use, so i removed the H50 and checked the CPU and around the CPU housing to see if i could find any scorch marks but i couldn't, so i re did the thermal paste and reseated the CPU, then i check the whole motherboard for any blown chips or caps and such and could find a mark, also checked the power phase's around the socket and everything looked fine. For the brief second that the power is on all lights and fans spin including the 2 on the H50 radiator and when it does manage to fully boot everything works fine for a while, ive even took apart the psu and cant see any scorch marks but it is hard to see in there even with the case off.
 
r3d zombie said:
checked the cpu temps in bios?, also, does your case have a panel cut out behind the CPU, anything making contact with the board?

if you think your PSU may be the problem, have you tried disconnecting cd/dvd drives and any additional HDD's you may have attached other than the boot drive, to see if that has any effect.
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It never gets as far as that , well i dont think so, I literally press the power switch and everything turns on, ie fans and lights and the motherboard gets to its first check which is the cpu and then it loses power or restarts due to a fault this taking place in a second, when trying it for a hour earlier it did boot up and everything was running fine the temps were all in the 20's with no load but then suddenly it would lose power. I say lose power because no blue screen appears saying there was a fault. Ive check the cut out in the motherboard tray and everything is still cable tied down out of the way of the cpu cut out, ive also tried disconnecting the drives and HDD's but still having the same issue.
 
mecca said:
change bios battery as a precaution, needs to be done very couple of years anyway, it can cause all sorts of problems.


if in doubt take out the battery and re boot, if it boots up you know what it is, they cost 50p
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Well ive tried it without the battery and its still having the same issue, but thanks for the input.
 
westom said:
Whether a computer powers on, powers off, etc is all determined by a power controller. Nobody can say what the controller is doing if you do not use a minute of labor to measure six wires. And report those numbers here.

Nothing inside the controller is known without a multimeter. So, every reply is based only in wild speculation. Or buy or borrow a 7 quid meter so that the few who know about the power controller can say what you have.
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I never said it was the psu, i said it could be, but it could be also the motherboard and hence why im asking here to see if any others have had similar experiences.
 
r3d zombie said:
dont suppose you have a (or can borrow) an alternative PSU to test?

do you have more than one stick of RAM installed (if so have you tried booting with just one stick then alternate)

what's the make and wattage of your PSU? does the fan spin up on it?
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Unfortunately i dont have a second psu, ive just tried booting with 1 stick of RAM and nothing, it wont even attempt to boot, there is a green light on my motherboard that lights up which is the standby power LED but nothing else now, lights dont light up fans dont spin its like the power cable isnt even plugged in now, so i guess i will have to take it to get fixed now, does OCUK do repairs?
 
r3d zombie said:
bottom of the board, below and left of where it says "sata 6gb) its a Asus P7P55D-E right?
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yeah it is that MB but the only place that says sata 6gb is in the middle of the board just below the DIMM slots..

There seems to be a few different layouts for this board
 
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westom said:
Often. A suspect list that can create your symptoms is quite long. Other posters have listed a minority.

An answer without speculation means multimeter is the only way to obtain that answer in the next reply. Even PSU testers are useless.

Long before the CPU can execute, the power controller makes numerous decisions. Your post could be saying it reboots before the CPU is allowed to work. Or after. All those decisions, even long before the BIOS executes, is decided by the controller.

Of course, if the CPU does not execute, then CMOS is never read. First the controller makes many decisions. Then the CPU is allowed to execute. Then the CPU executes the BIOS. Then the BIOS reads CMOS. None of that happens if a power controller forbids it.

Remove all RAM and the video card. If the motherboard does not beep an error code, then the CPU is not even executing.
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Ive tried what you suggested and still nothing, fans dont spin the lights dont come on, the only spark of life is that the MB standby LED turns on but that happens when i plug the computer in, nothing happens at all when i press the power button now.
 
westom said:
The fans would spin and light came on when the power button was pressed? All you did is unplug the computer to remove Ram and video card. Then connected the computer and pressed its power button. Nothing? Is that what you have said?

If that is what happened, then somthing else has also changed or moved. Again, with the meter, I could say specifically. Without such facts, I can only suggest (speculate) that you have moved or disconnected something. Or speculate on other possibilities. Removing Ram and Video card does not affect how the power controller monitors a power button.
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You are correct the fans and lights would come on and the cpu check led would flash on before crashing but since i tried removing the cmos battery and removing all but 1 stick of ram and then seeing if would boot as requested by a poster in this thread it will not even do that now, it seems to have made it worse, currently all it does with everything plugged in ie ram, video card is nothing at all when i press the power button, the only signs of life atm is when i plug in the power socket, the standby led light on the MB will light up and that is all. As ppl have posted i have tried to move all ram, all but 1 ram stick and the video card and still no signs of life apart from the standby led.
 
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