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Windows 7: PC won't turn on after a short run of CPU fan

17 Oct 2017   #1
rouward

Windows 7 Professional 64-bit
 
 
PC won't turn on after a short run of CPU fan

Been working at computer shop for decades and knows how to fix the most common PC problems, however this is one rare case I couldn't solve with the basic troubleshooting (cleaning, clr cmos, replace with new cr2032 spare, breassembling parts, PSU swap, detached RAM and HDD). I'm still figuring whether it's the faulty mobo, CPU or both were permanently damaged because of overusage or its age (6 years to be exact) and in need of replaced with new spares.


My System SpecsSystem Spec
.
18 Oct 2017   #2
Megahertz07

Windows 7 HP 64
 
 

Welcome to the Forum

Sorry, I didn't understand what is the problem.
It is on a desktop or laptop?
The CPU fan runs for a short period of time and it doesn't boot?
My System SpecsSystem Spec
18 Oct 2017   #3
rouward

Windows 7 Professional 64-bit
 
 

Desktop. Forgot to mention it 'cause I wrote it on the title (lol)
Basically, my PC runs short and immediately shuts down shortly after pressing the power button on the CPU case. The CPU fans spins for like half a second. It cannot reopen until I switch off the AVR and do it again, however no matter how many times I tried, the PC still shuts down shortly.
It must be either on CPU or MOBO.
My System SpecsSystem Spec
.

4 Weeks Ago   #4
georgeks

Windows 10 Pro x64
 
 

If you read here
System Boot Process of BIOS - Windows 7 Help Forums

and since you have already replaced the Power Supply, it appears that is CPU or mainboard.

I saw something similar years ago while at HP-could be the same issue.

It is called BGA failure (Ball Grid Array) meaning the soldering on the motherboard has developed tiny cracks.
It was far more common some years back when the switch was made from lead soldering to lead-free, as the lead-free required higher temperatures and the companies were still using the old tools.
My System SpecsSystem Spec
4 Weeks Ago   #5
RoasterMen

Windows 10 Pro 64-bit
 
 

I've had a similar problem to yours. Mine was a faulty RAM and a fault ram slot (on my other system), removed the stick on that specific slot and the system started booting just fine, try and see if it works for you.
My System SpecsSystem Spec
4 Weeks Ago   #6
georgeks

Windows 10 Pro x64
 
 

"...is one rare case I couldn't solve with the basic troubleshooting (cleaning, clr cmos, replace with new cr2032 spare, breassembling parts, PSU swap, detached RAM and HDD)..."
My System SpecsSystem Spec
4 Weeks Ago   #7
Megahertz07

Windows 7 HP 64
 
 

Please edit your profile with the MB and CPU specs.
I'm having quite the same problem with a GA Z87 MB and a i5 4670k. In my case it runs for a minute or two then shuts down. I still didn't find out if it is the MB or the i5.
A friend had same problem and it was the i5.
My System SpecsSystem Spec
4 Weeks Ago   #8
rouward

Windows 7 Professional 64-bit
 
 

Quote   Quote: Originally Posted by georgeks View Post
If you read here
System Boot Process of BIOS - Windows 7 Help Forums

and since you have already replaced the Power Supply, it appears that is CPU or mainboard.

I saw something similar years ago while at HP-could be the same issue.

It is called BGA failure (Ball Grid Array) meaning the soldering on the motherboard has developed tiny cracks.
It was far more common some years back when the switch was made from lead soldering to lead-free, as the lead-free required higher temperatures and the companies were still using the old tools.
I could be like that since my mobo kept running for 6 years since we start our business (and recently discovered that its manufacture, ECS, had long history of poor quality products). I barely remember the last time I had that issue on other PC and was fixed with replacing a new mobo.

Quote   Quote: Originally Posted by Megahertz07 View Post
Please edit your profile with the MB and CPU specs.
I'm having quite the same problem with a GA Z87 MB and a i5 4670k. In my case it runs for a minute or two then shuts down. I still didn't find out if it is the MB or the i5.
A friend had same problem and it was the i5.
I had various PCs with different brands and parts so I only put my main PC on my bio.
With your issues, it could be your PSU or AVR and need to replace them with new parts.

I'll try to buy a new mobo by next month and update this post asap.
My System SpecsSystem Spec
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 PC won't turn on after a short run of CPU fan




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