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Help confirming cause of dead computer....

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Computer generally left on 24/7.... got home to find it off. No power cut, just off. Switched it on, and it'll last between 1 and 20 seconds, before powering down. Not a software fault - this hap… Read More
vibeone Avatar
banned7y, 9m agoPosted 7 years, 9 months ago
Computer generally left on 24/7.... got home to find it off. No power cut, just off.

Switched it on, and it'll last between 1 and 20 seconds, before powering down. Not a software fault - this happens before the OS loads.

Disconnected all connections bar 12v rail and main mb plug. Same. Removed all RAM, same. 1 stick of ram, same.

When working (for around 20 seconds) windows begins to load fine etc. No bluescreen - just powers down.

So, its either mobo or PSU, and I believe it to be the PSU. Just wondered if people agreed with me. The PSU also makes a strange clicking noise sometimes, and I believe that just adds to the evidence.

Secondly, I need this fixing asap, so looks like its PC World I'm afraid. Any thoughts on which one to go for. Need about 450-500watt.

The PSU is 2 months out of warranty with Hiper... which is annoying, and surprising because Hiper are a decent brand. Or so I thought :(
vibeone Avatar
banned7y, 9m agoPosted 7 years, 9 months ago
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#1
another possibility is CPU overheat. Id check CPU temp in bios
#2
From what you say id say its the MB.

If you have a multimeter check the voltage the supply is giving out!

http://www.ochardware.com/articles/psuvolt/psuvolt2.html
#3
KINGMUZZZAUK
From what you say id say its the MB.

If you have a multimeter check the voltage the supply is giving out!

http://www.ochardware.com/articles/psuvolt/psuvolt2.html


Check that, then check mobo.

What's the mobo in it?

Any other pcs you can try the psu out on?
#4
try taking off heatsink ,clean all paste residue and apply fresh layer not too much just a dab, then reseat heatsink fan,should do the trick,from hubby who is a pc tec
1 Like #5
You do know that Hiper PSUs have a 36month warranty, not 12!?
#6
Sounds like a CPU overheat to me.
banned#7
missismop
try taking off heatsink ,clean all paste residue and apply fresh layer not too much just a dab, then reseat heatsink fan,should do the trick,from hubby who is a pc tec


I work with PCs all the time :) I've done all of the above last night, but thanks for the post.

I'm aware the Hiper PSUs have 36 months, unfortunately, according to the build date, I'm on 38 months. However, i might just be in on purchase date, but doubtful.

Interested in knowing why you think its mobo or CPU. Mobo won't power on without CPU in - by power on I mean It should turn on and screma at me - but it doesn't, it just dies.

Don't wanna try PSU in another system in case it causes damage to system. Despite the comments, still pretty sure this is a PSU issue.
#8
vibeone
I work with PCs all the time :) I've done all of the above last night, but thanks for the post.

I'm aware the Hiper PSUs have 36 months, unfortunately, according to the build date, I'm on 38 months. However, i might just be in on purchase date, but doubtful.

Interested in knowing why you think its mobo or CPU. Mobo won't power on without CPU in - by power on I mean It should turn on and screma at me - but it doesn't, it just dies.

Don't wanna try PSU in another system in case it causes damage to system. Despite the comments, still pretty sure this is a PSU issue.


Well buy a cheap psu then?

Don't see what you can do otherwise without a vaultmeter, or without testing it elsewhere, or with another one. Grab a psu out of another machine and disconnect everything thats not needed bar one hard drive. Boot and see what happens?

Kinda guessed you would of checked the CPU as you wouldn't be here if it was something simple.
#9
Tried clearing cmos and/or bios?
#10
Painkiller
Tried clearing cmos and/or bios?


Guessing he's tried that when fiddling with the memory.
#11
If you have fully isolated the PSU and the power is still failing then it would appear that it is the PSU. If multimeter available check outputs under no load.
banned#12
Adam2050
Guessing he's tried that when fiddling with the memory.

Yeah I've done all the obvious, but you guys gotta understand that while I can reset the CMOS, and the bios, I can't get into the bios or anything else before the thing powers itself down.

The CPU heatsink and fan is a a decent spec thing, i think its arctic something 7, and its spinning correctly etc. Temp has never been close to being an issue in the past, so I narrowed it down to PSU or mobo. Mobo is getting on a bit, but its one of those things I guess - I got a strong suspicious the mobo is good.

I think you are right though adam - can't/won't test the PSU (As I'm 90% sure it is PSU) in another computer, so will buy a £15 PSU if possible at weekend..... I've kinda decided pc world is a bad idea unless anyone knows different?
banned#13
Murielson
If you have fully isolated the PSU and the power is still failing then it would appear that it is the PSU. If multimeter available check outputs under no load.

No multimeter to test.

I've never know a mobo fail in such a way before. I've had them die completely, but no this half way house thing I've got.

The power lamp on the case btw, comes on and fades out, like the entire system just doesn't have enough juice. Gotta be PSU for me, but whichever I replace, itll be the wrong thing! :)
#14
vibeone
Yeah I've done all the obvious, but you guys gotta understand that while I can reset the CMOS, and the bios, I can't get into the bios or anything else before the thing powers itself down.

The CPU heatsink and fan is a a decent spec thing, i think its arctic something 7, and its spinning correctly etc. Temp has never been close to being an issue in the past, so I narrowed it down to PSU or mobo. Mobo is getting on a bit, but its one of those things I guess - I got a strong suspicious the mobo is good.

I think you are right though adam - can't/won't test the PSU (As I'm 90% sure it is PSU) in another computer, so will buy a £15 PSU if possible at weekend..... I've kinda decided pc world is a bad idea unless anyone knows different?


Go with you gut feeling, I tend to do this with pc stuff when its been in my posession and I know its past faults and niggles always best.

I would see if you can get a cheap psu there and then maybe take it back when you found a replacement.

Would deffo ring up/contact the manufacturers when you have done so.
banned#15
SUMMONER
If it is a Freezer 7 Pro/LP, you must have a Pentium 4 or better. They don't turn off when they get too hot, just slow down their clock speed. Get another power supply, it's the most likely.

Thanks for this - good bit of info. Hadn't really realised specs might be useful....

Gigabyte 965P-DS3 (3.3)
Core 2 Duo 6420 @ 2100ish
4GB branded RAM (can't remember was so long ago, but is a good brand and heatsync'd up)
1tb SATA 300 hd (even when disconnect, same applies).

Thats about all thats useful.

So at least it seems the CPU is alive. Mobo dying would be less likely than the PSU dying surely?

Thanks Summoner.
#16
vibeone
Thanks for this - good bit of info. Hadn't really realised specs might be useful....

Gigabyte 965P-DS3 (3.3)
Core 2 Duo 6420 @ 2100ish
4GB branded RAM (can't remember was so long ago, but is a good brand and heatsync'd up)
1tb SATA 300 hd (even when disconnect, same applies).

Thats about all thats useful.

So at least it seems the CPU is alive. Mobo dying would be less likely than the PSU dying surely?

Thanks Summoner.


Gigabyte, they have the LED read out on the higher spec mobos does this one?
banned#17
Adam2050
Gigabyte, they have the LED read out on the higher spec mobos does this one?

yes - but as I've said, the entire power dips completely. POST starts normally... then the entire thing wipes out - the LED display is not powered from any battery source, so is wiped same as the rest.

I don't mean the computer turns off into 'soft-off - I mean its like flipping the plug switch - ZIP.... everything off.
#18
'between 1 and 20 seconds' you put, theres no way that's pushing 5 seconds.

Definetly psu, as the mobo would beep like made and maintain power on the gigabytes.
1 Like #19
PSU as you's suspect. (one of my many with flashy lights and you see em just fade out , you see keyboard light up then off) Psu

Clicking noise could also be a broken hard drive as well, which can reset system constantly even possibly power off. Incorrect RAM speed/voltage could cause power off. However as you have reset CMOS then proper timings voltage will be applied and fix shutting down auto. So Psu = (1st choice). 2nd Board fried, loose screw touching , cmos pins wrongly jumpered.

Hope you get it sorted soon.
banned#20
Adam2050
'between 1 and 20 seconds' you put, theres no way that's pushing 5 seconds.

Definetly psu, as the mobo would beep like made and maintain power on the gigabytes.


Boogie83e
Can't you check the Hardware details; CPU temp, Voltage, etc, in the BIOS screen?



God I really should have known better than to try and get technical help on HUKDs. One useful reply in 2 pages worth.

Adam, for the millionth time, the system performs perfectly normally until it shuts off. Be that 1second, 5 second, 20 seconds or 3 years. The LCD display does not show anything untoward - the usual POST codes (if it makes it that far).

Boogle, again I cannot get the bios screen before the system shuts down. I've got 20 seconds out of it once, usually its a few seconds then nothing.
banned#21
dontasciime
PSU as you's suspect. (one of my many with flashy lights and you see em just fade out , you see keyboard light up then off) Psu

Clicking noise could also be a broken hard drive as well, which can reset system constantly even possibly power off. Incorrect RAM speed/voltage could cause power off. However as you have reset CMOS then proper timings voltage will be applied and fix shutting down auto. So Psu = (1st choice). 2nd Board fried, loose screw touching , cmos pins wrongly jumpered.

Hope you get it sorted soon.

hard disk was disconnected when I heard the clicking :)

but thanks for providing the second useful reply :)

(There may be others but jeeze reading this is pretty soul destroying. Will ask mods to lock before I lose the will to live).
#22
vibeone
God I really should have known better than to try and get technical help on HUKDs. One useful reply in 2 pages worth.

Adam, for the millionth time, the system performs perfectly normally until it shuts off. Be that 1second, 5 second, 20 seconds or 3 years. The LCD display does not show anything untoward - the usual POST codes (if it makes it that far).

Boogle, again I cannot get the bios screen before the system shuts down. I've got 20 seconds out of it once, usually its a few seconds then nothing.


Vibe your not filling the gaps thats why your not getting very far, or getting repeat answers.

And I'm agreeing with your assumption:thumbsup:

The LCD display showing the usual POST codes give me more evidence that theres nothing wrong with the mobo whats so ever, as you have just stated it can last longer:p

SO Psu it is then. No other way about it as you have now filled in the jigsaw puzzle.:whistling:

Can't really understand your frustration. Us only getting bits of information is a lot to work on.
banned#23
Adam2050
Vibe your not filling the gaps thats why your not getting very far, or getting repeat answers.

And I'm agreeing with your assumption:thumbsup:

The LCD display showing the usual POST codes give me more evidence that theres nothing wrong with the mobo whats so ever, as you have just stated it can last longer:p

SO Psu it is then. No other way about it as you have now filled in the jigsaw puzzle.:whistling:

Can't really understand your frustration. Us only getting bits of information is a lot to work on.

Maybe, and it wasn't directed at you in particular, but a couple of other posters seem to have understand what I was getting at....

I'm also frustrated at PC World, as there pathetic over the top prices mean I won't be up and running until the weekend.

Can easily afford PC World, I just refuse to pay the crazy machines for cheap tat like Jeantech :)
#24
I'd agree with you on power supply, if the motherboard is at fault it normally won't power on entirely, will beep at you or error at POST or will just bluescreen when hitting Windows. If you go into the bios setup does it last any longer before powering down?

John
#25
vibeone
Maybe, and it wasn't directed at you in particular, but a couple of other posters seem to have understand what I was getting at....

I'm also frustrated at PC World, as there pathetic over the top prices mean I won't be up and running until the weekend.

Can easily afford PC World, I just refuse to pay the crazy machines for cheap tat like Jeantech :)


I don't blame you on the second point. Never bought anything there never will.:thumbsup:
#26
For my pennies worth it would 'seem' from the information given that the fault lies with the PSU.

In a few faulty computer's with the same reported problem I found the cause was an upgraded graphics card drawing more power than the resident PSU was able to supply. Notably this occurred using PCI-E graphic cards. Either the PSU was under-rated or had aged so much (you said it was on 24/7) that it could no longer supply a smooth regulated 12v and 5v output.

One method to be sure would be to leave the hard drive connected, disconnect / remove the graphic card and see if the computer powers up and stays up while loading the operating system. If it all continues to work (sans graphic card) then the likely cause is a tired/under rated PSU.

T
banned#27
Tadanori
For my pennies worth it would 'seem' from the information given that the fault lies with the PSU.

In a few faulty computer's with the same reported problem I found the cause was an upgraded graphics card drawing more power than the resident PSU was able to supply. Notably this occurred using PCI-E graphic cards. Either the PSU was under-rated or had aged so much (you said it was on 24/7) that it could no longer supply a smooth regulated 12v and 5v output.

One method to be sure would be to leave the hard drive connected, disconnect / remove the graphic card and see if the computer powers up and stays up while loading the operating system. If it all continues to work (sans graphic card) then the likely cause is a tired/under rated PSU.

T

Thanks. Bare in mind this has worked in current config for about 2 years :) But I agree with you, and suspect without the GPU it may well last longer, but it doesn't really make a difference does it? Need a new un! :)
banned#28
Johnmcl7
I'd agree with you on power supply, if the motherboard is at fault it normally won't power on entirely, will beep at you or error at POST or will just bluescreen when hitting Windows. If you go into the bios setup does it last any longer before powering down?

John


makes no real difference john, the majority of the time it lasts about 3/4 seconds, and the GPU has to bios first, before the mobo gets a look in, by which point... goodnight all! :)
1 Like #29
i know whats wrong. its broken.

:)
#30
shanecr
i know whats wrong. its broken.

:)


Now you're just guessing : :thumbsup:
#31
You tried disconnecting the PSU from the system totally and turning it on by shorting the green wire to ground? If the PSU cuts out itself after a few seconds its definately the problem!

http://www.techpowerup.com/articles/other/22
#32
jah128
You tried disconnecting the PSU from the system totally and turning it on by shorting the green wire to ground? If the PSU cuts out itself after a few seconds its definately the problem!

http://www.techpowerup.com/articles/other/22


was reading thru and just about to suggest this, fyi a faulty temp sensor on mainboard can also do this effect so consider obtaining a psu tester if the above gives no results.
banned#33
jah128
You tried disconnecting the PSU from the system totally and turning it on by shorting the green wire to ground? If the PSU cuts out itself after a few seconds its definately the problem!

http://www.techpowerup.com/articles/other/22

will try this tonight, although as the time it works for varies, I suspect it may only fail under load. Still, work a try! :) thanks.
banned#34
Right, so its apparent that the PSU does function normal-ish using the pinout trick. However, clearly there is no load at this point.

While I was messing about, I connected the PSU to the computer without installing it in the case, just had it loose.

Its definately the PSU that makes the odd sounding clicking noise (its not from the fan)...

Just to add, the mobo does attempt a few times to restart. ie: power on, power dies, power is restored (blue led fans in the case turn on etc, power dies, power restored.... then eventually it dies completely, until I unplug.

This to me suggests the mobo is trying its best, but the PSU is just not pulling its weight.

Any final suggestions? I'll be nice this time.
#35
vibeone
Right, so its apparent that the PSU does function normal-ish using the pinout trick. However, clearly there is no load at this point.

While I was messing about, I connected the PSU to the computer without installing it in the case, just had it loose.

Its definately the PSU that makes the odd sounding clicking noise (its not from the fan)...

Just to add, the mobo does attempt a few times to restart. ie: power on, power dies, power is restored (blue led fans in the case turn on etc, power dies, power restored.... then eventually it dies completely, until I unplug.

This to me suggests the mobo is trying its best, but the PSU is just not pulling its weight.

Any final suggestions? I'll be nice this time.


Hit it with BFH ;-)
banned#36
dontasciime
Hit it with BFH ;-)

first thing I tried :P
#37
dcx_badass
Ninjas.


:-D
#38
Most likely PSU.
But if possible try powering the whole system with a spare psu from another computer.
The PSU can also end up taking out other components with it (Happened to me once.)
#39
It's your psu. Same thing happened to me just last week. That clicking sound could be a relay on a thermal control circuit switching the system off due either to an overload or short circuit. In my case a Resistor had actually shorted out! :x
#40
dontasciime;6050333
Now you're just guessing : :thumbsup:

:giggle:

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