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powering off

manisinghb

manisinghb

manisinghb

Associate
Joined
12 Apr 2009
Posts
627
got a problem guys, my system switches off as soon as i power the computer on.
however, when i take the atx pci power connection for the CPU out, the computer remains powered on but obviously won't boot up. it's when i connect this power supply for the cpu that the computer switches off after i power it on...any ideas?
 
Is this a new system?
Are you overclocked, try a CMOS reset and single stick of ram.
 
RJC said:
Is this a new system?
Are you overclocked, try a CMOS reset and single stick of ram.
Click to expand...

yes new system but i have been using it for a couple days, its only today this started happening after i reseated the cpu

i have tried resetting the cmos and single stick of ram also, still no luck. also, when i hold the 'clear cmos' button on the mobo, the system will stay powered on but nothing will happen (apart from clicking of somesort i think) i took the battery out for a couple minutes bt still no luck
 
RJC said:
Double check the cpu again, why did you need to reseat the cpu.
Click to expand...

cpu is fine have checked many times =(

was having problem with my memory. i have 6gb (2x3gb sticks) installed but the system was only using 4gb of ram. some guys on here suggested i reseat the cpu... ironic!
 
Hmm strange one, have you tried each stick individually just in case the memory stick you tried is the faulty one :( and try in each memory slot.

Another option is to test the board external to the case, the psu may be pick up a short on the cpu power connector.
 
"when i take the atx pci power connection for the CPU out, the computer remains powered on"

Which connector do you call "atx pci power", and did you really take it out while the computer was running? If so I'm going to hazard a guess at you killing your motherboard by unplugging things while it was running.

I'm sure they meant reseat the heatsink, not the cpu. The common solutions for less than 6gb of ram being seen are increasing qpi voltage or decreasing pressure on the cpu socket, I think they had the latter in mind.
 
RJC said:
Hmm strange one, have you tried each stick individually just in case the memory stick you tried is the faulty one :( and try in each memory slot.

Another option is to test the board external to the case, the psu may be pick up a short on the cpu power connector.
Click to expand...

how can i test it externally? u mean take the mobo out of the case and connect the psu like that?
 
JonJ678 said:
"when i take the atx pci power connection for the CPU out, the computer remains powered on"

Which connector do you call "atx pci power", and did you really take it out while the computer was running? If so I'm going to hazard a guess at you killing your motherboard by unplugging things while it was running.

I'm sure they meant reseat the heatsink, not the cpu. The common solutions for less than 6gb of ram being seen are increasing qpi voltage or decreasing pressure on the cpu socket, I think they had the latter in mind.
Click to expand...

LoL Jon u really do take me as a **** right?? of course i didn't unplug or plug anything in with the computer running!!! sorry for the lack of detail! and no, they actually did advise to reseat both the block and the cpu. i tried decreasing the pressure on the cpu socket, but of course now i have this problem. seems as though i aint the only one however

http://forums.overclockers.co.uk/showthread.php?t=18059718
 
It's more that I can't work out what you're talking about most of the time. The atx pci connector, at a guess, goes to the graphics card, yet you identify it with the cpu. What cable do you mean? The 4 or 8 pin atx cable, the 6 or 8 pin peg cable, something else again? Why are you using attempted booting with cables missing as a diagnostic method?

"When I take it out, the computer remains powered on". What did you intend to say if you haven't pulled out the cable while the computer is on? It isn't lack of detail I'm struggling with, it's lack of coherence.

The boot issues known with the UD5 are considerable delay before posting, and if unlucky, it takes several tries to boot. This doesn't sound anything like what you're describing, which appears to be "computer won't turn on, even when I pull out some of the cables".

I'm not trying to be a ****, and really would like to help here, but if I can't work out what the problem is or what diagnostics you've done, I don't know how to.
 
right i hope i will be coherent now...

i am talking about the 8pin atx cable for the cpu. the computer keeps restarting itself after i put it on. it restarts itself immediately even before booting up. i was suspecting some link to the cpu as it started doing this after i reseated it.
so (after switching the computer off from the mains) i took out the 8pin atx cable and switched the computer back on, and with this the computer remains powered on (no restarting) but doesn't boot (obviously as there is no power going to the cpu)...
 
Ahh good, I'm with you now. Cheers

Do you have a spare psu you could test it with, or a second cpu power line from the psu? The most likely options are psu or motherboard misbehaving, so it would be good if you can try the psu in a different system/try a different psu in your one. If the psu runs another system fine, it doesn't mean it's working normally, but it does mean it's not completely knackered.

Otherwise it's probably the motherboard. Symptoms becoming worse after reseating the cpu makes me worry that you may have damaged the socket when reinstalling it. Not detecting all the ram is generally a motherboard issue, if the cpu's memory controller was dodgy it would be expected to ignore all ram, not just some of it.

Other options are ram/cpu. Ram can be rather delicate, but trying sticks one at a time normally resolves this. Cpu's are hard as nails, unless something really unfortunate has happened it's probably fine.

Good luck, diagnostics sucks
 
cheerz mate, yup as RJC suggested also, might try and test the PSU/MoBo externally. Will give this a go tomorrow or monday, but in all honestly I have a gut feeling the MoBo maybe knackered ='(
 
hey guys just a quick thing i was thinking of, on the mobo there is a 8pin pci power connection slot for the cpu socket. however, due to the shapes of the pins on the pci cable running from my psu, i was only able to connect 4pins out of 8. however, i then found an adapter in the psu box which lets me connect all 8pins to the 8pin slot on the mobo for the cpu socket. does anyone think there is a potential risk in doing this? overvoltage etc?
 
Don't use the adapter for now.

If there is an 8 pin socket on the board, and an 8 pin cable coming from the psu (should have 4 yellow, 4 black cables), and they don't fit into each other I'd deduce you need to turn the cable around.

You keep on saying pci which worries me, the only power cable you could associate with pci is the one that goes to graphics cards and you don't want to plug this into the motherboard, even if it does have 8 pins.

Could you provide photographs? Especially of the adapter you're planning on using, but also of the cable you're trying to fit into the motherboard.
 
sorry i got bad habit lol, not the pci cables (these are in my graphics card) meant the molex type connections? will try uploading pics

p.s. have tried turning the cable around can only connect 4pins out of 8 running from the psu directly. but as i mentioned with the adapter i can connect all 8
 
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