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power issues, strange behaviour before no response


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#1 lequeer

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Posted 23 September 2016 - 07:33 PM

Hi there.

I left my computer idle before bed last night, woke up to it off this morning. no response to moving the mouse or power button. I started playing with cords and when re plugging the power cord back into the tower it booted, then died about 5 seconds after. I re plugged again, it turned on, I accessed the boot menu and this triggered some immediate updates for about 10 minutes. It reached the log in screen, when it turned off again and is now responding to nothing.

Can anyone guess a possible issue from this activity? thanks so much in advance for any help!



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#2 dc3

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Posted 24 September 2016 - 02:10 PM

What operating system are you using?

 

Have you taken a look inside the case to see if there is an accumulation of dust, especially in the heatsink and fan assembly on the CPU?

 

Do you have the installation media for this version of Windows?


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#3 lequeer

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Posted 24 September 2016 - 08:36 PM

I'm running windows 8, yes I have installation media. There is dust... I would say a moderate amount. Would a picture help you?
I appreciate you taking time

Edited by lequeer, 24 September 2016 - 08:37 PM.


#4 dc3

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Posted 25 September 2016 - 08:08 AM

Purchase a can of a duster product and blow out the fan and heatsink.  I would also help if you blow out the rest of the inside of the case.  See if this helps.  If you still can't boot into Windows I will provide you with instructions for running a repair from the installation disc.


Edited by dc3, 25 September 2016 - 08:10 AM.

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#5 lequeer

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Posted 25 September 2016 - 05:58 PM

I've cleaned it out, still wont power on at all. I'm wondering if I should be checking if the power supply is dead?
 



#6 dc3

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Posted 26 September 2016 - 08:02 AM

Insert a Windows 8.1 DVD, or a flash drive with the Windows installation files on it, into your computer.
 
Boot from the disc or boot from the USB device, whatever your situation calls for.
 
From the Windows Setup screen, tap/click on Next.
 
Tap/click on the Repair your computer link at the bottom of the window.
 
Advanced Startup Options will start, almost immediately.

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#7 lequeer

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Posted 26 September 2016 - 02:07 PM

i'm sorry, I think you misunderstand... I can't get it to power on at all. I can't open the dvd drive... I dont think this is a windows issue, my uneducated guess is the motherboard or power supply... leaning towards power supply since it did boot into windows when I checked if the power cord was plugged in properly. after suddenly turning off that time I can't get it to power on at all. 
 



#8 dc3

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Posted 26 September 2016 - 02:53 PM

Try this, with the computer turned off and the power switch on the power supply turned off and unplugged from the wall receptacle open the case and remove the 24 pin PSU connector from the motherboard.

 

Take a piece of wire or a paperclip and use it as a jumper between the green wire and any black wire sockets.  Make sure the wire is isolated from any other metal.

 

Plug the PSU back in to the wall socket and turn the PSU on.  The case fans should spin if the PSU is working.


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#9 lequeer

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Posted 27 September 2016 - 03:43 PM

No action from the fan. Thanks for your help, I'll source a new psu.
its really great that these forums exist, I like being able to learn about computers while saving some cash. Have a good day

#10 dc3

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Posted 28 September 2016 - 08:24 AM

Let us know if the PSU resolves your problem.


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