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Computer has trouble powering up - again

post #1 of 15
Thread Starter 
Hi fellas,

I was asking about this same problem here some half a year ago. Thought it went away, and now its been coming back worse than before.

OK so to explain in detail: When pushing power button to computer sometimes it powers on, sometimes it does not. Most of the time just get "click" sound from power source and standby and memory lights go on, main power light does not. Fan does not go on, does not boot. HOWEVER, if I unplug the computer for the whole night, plug it in again in the morning, many times it starts up. Whats more annoying is the fact that this does not work 100% of cases though. Some days I just dont get it on at all. Sounds stupid I know, but it feels to me like the power gets "drained" or something if I leave it plugged. Another option is to just let it be on forever, then there is no problem.

I live in Japan and use a European plug with a big adapter with this computer (4 years old alienware) that says up to 1500 watts. Just bought it when old one broke down (actually I thought this was the cause of the problem, but turned out it wasnt). First day I plugged in the new adapter it started up right away. Next day after a night of being shut down, didnt anymore. Back to the old routine of unplugging it for a long time and then hoping...

As instructed before I tried the jump-start thing with a paper clip when taking the power completely off the computer. It does the same thing as when pushing power button, click sound. So it reacts anyways.

Did try, as instructed, with taking out all different memories one by one etc. and other attached things like HDD and video card, didnt affect the case.

Anyways: One thing is for sure. The computer being unplugged for a longer period of time does affect whether it powers up the next day. If I left it plugged for the night it would never go on again the next day when I was doin g "test trials" for a while.

Do I need to start looking at new power sources? Would be nice to be absolutely certain about the cause first, though.
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diegameL
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post #2 of 15
sounds like a psu problem or a short somewhere

if the paperclip test fails (green to black on the 20/24pin mobo plug)
try unpluging everything else from the psu and test again
(both mobo plugs, all drives fans ect..)

if that works, try with just the mobo
then add drives
and fans

odds are a fan is dying and drawing too much current
post #3 of 15
Thread Starter 
Quote:
Originally Posted by ffejrxx View Post
sounds like a psu problem or a short somewhere

if the paperclip test fails (green to black on the 20/24pin mobo plug)
try unpluging everything else from the psu and test again
(both mobo plugs, all drives fans ect..)

if that works, try with just the mobo
then add drives
and fans

odds are a fan is dying and drawing too much current
Yeah the first time I did it was with the PSU completely unplugged from all. Will proceed to try with stuff attached then.
diegameL
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diegameL
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post #4 of 15
Quote:
Originally Posted by diegamel View Post

As instructed before I tried the jump-start thing with a paper clip when taking the power completely off the computer. It does the same thing as when pushing power button, click sound. So it reacts anyways.
It just clicks? the fans doesn't go on?
Dorianime
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Dorianime
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post #5 of 15
Thread Starter 
Quote:
Originally Posted by Dorianime View Post
It just clicks? the fans doesn't go on?

Yes. Just tried again with everything detached, only PSU. Only repeated click sounds.

So I guess that kinda makes it useless to try WITH attachments if even alone it doesnt power up?

But how the hell does it power up if I keep it unplugged for a long time, then?
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diegameL
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post #6 of 15
you plugged into a surge protector plug socket/extension by any chance?

had a problem like this when i first built my pc, unplugged it from the extension straight into the wall and starts up first time every time
    
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post #7 of 15
Thread Starter 
Quote:
Originally Posted by pale View Post
you plugged into a surge protector plug socket/extension by any chance?

had a problem like this when i first built my pc, unplugged it from the extension straight into the wall and starts up first time every time
Am using surge protector indeed, but I also tried straight to the wall many times and didnt change.


BTW: Something weird just happened. I had forgotten to remove one of the case fans apparently -- when jump starting suddenly one of them started powering up. Second time didnt anymore. Eh...
diegameL
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diegameL
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post #8 of 15
Thread Starter 
Hahaa I think I found it! It looks like it was a dying case fan indeed! I had always forgotten to unplug it when testing. Now unplugged and PSU started up. Ill see with other stuff next when case fan unplugged.
diegameL
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diegameL
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post #9 of 15
Quote:
Originally Posted by diegamel View Post
Hahaa I think I found it! It looks like it was a dying case fan indeed! I had always forgotten to unplug it when testing. Now unplugged and PSU started up. Ill see with other stuff next when case fan unplugged.
This sounds unlikely! but if you never get troubles at all let us know! Crazy, i would have never thought of this!
Dorianime
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Dorianime
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School Rig
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post #10 of 15
Thread Starter 
Quote:
Originally Posted by Dorianime View Post
This sounds unlikely! but if you never get troubles at all let us know! Crazy, i would have never thought of this!
Victory short lasted. After plugging everything in again, trying, didnt start up. Now unplugged everything included the same fan, again doesnt start up. Jeebus this is getting tedious...
diegameL
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diegameL
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