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Computer shut down and won't boot up anymore


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#1 Guy123456

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Posted 04 June 2017 - 02:37 PM

I was watching a video on my custom PC, and as I went to my speaker jack into my PC, the computer shut down and now, after a days time, still wont boot up again.

 

I have tried the paper clip test; the fan on my case starts up, but the CPU fan and the fan that is connected to the motherboard do not start.

 

There is a green LED switch on my motherboard, and it does flash every so often.

 

I have tried to "jump" the motherboard, but nothing happens.

 

I do not think the PSU or the power switch is the problem, so if anyone can tell me what to test/fix next that would be appreciated.

 

Specs:

 

GeForce GTX 970 Graphics Card

Intel Core I5-4460 Quad-Core Processor

EVGA 600W 80plus Bronze power supple

Asus Z97-A 1150 Intel Motherboard

 

[Moved to Internal Hardware Forum from Introductions - britechguy]


Edited by britechguy, 04 June 2017 - 02:46 PM.
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#2 TOMIS13LACK

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Posted 04 June 2017 - 09:52 PM

The fan starts... is it going at full speed upon starting? If so, it is most likely the processor. If it turns on and ur cpu fan sounds like a jet, that is probably it. 


Edited by TOMIS13LACK, 04 June 2017 - 09:52 PM.

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#3 MDD1963

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Posted 05 June 2017 - 03:50 AM

Actual processor failures are relatively rare....(incidents of users damaging pins and/or spilling conductive paste onto the mb or cpu contacts are much more common)

 

Easiest thing is to try a known good PSU of sufficient wattage...

 

If your mb/cpu support integrated video, you can remove the GPU entirely to rule it out....; certainly if you still have POST issues, the GPU is now not relevant...


Edited by MDD1963, 05 June 2017 - 04:16 AM.

Asus Z270A Prime/7700K/32 GB DDR4-3200/GTX1060


#4 TOMIS13LACK

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Posted 05 June 2017 - 05:11 AM

I know how rare they are, but it happens. The mobo usually kills itself to save the processor. Check to see if it is at least congested or has thermal paste on one of it's pins.


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#5 Guy123456

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Posted 05 June 2017 - 10:39 AM

The fan starts... is it going at full speed upon starting? If so, it is most likely the processor. If it turns on and ur cpu fan sounds like a jet, that is probably it. 


I have 3 fans in my pc. One fan is on the side of the case and is directly connected to the PSU. This is the fan that turns on when I do the jump start on the motherboard.

I have my CPU fan, which does not turn on.

Lastly, I have a fan on the side of my case that revives power through the motherboard. This fan does not turn on.

#6 Guy123456

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Posted 05 June 2017 - 10:41 AM

I know how rare they are, but it happens. The mobo usually kills itself to save the processor. Check to see if it is at least congested or has thermal paste on one of it's pins.


When doing the jump start method with the power switch pins, I found a green goo on the pins, which stuck onto my screwdriver. Is this what you were talking about?

#7 TOMIS13LACK

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Posted 05 June 2017 - 01:52 PM

thermal paste is a grey ish material that would be found directly on the processor


Edited by hamluis, 06 June 2017 - 09:20 AM.

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#8 Guy123456

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Posted 05 June 2017 - 04:17 PM

There was no spill of the paste onto the proccesor pins. Does this eliminate the processor as the problem?


Edited by hamluis, 06 June 2017 - 09:20 AM.


#9 TOMIS13LACK

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Posted 05 June 2017 - 05:26 PM

It doesnt eliminate it, but makes it a lot less likely


Edited by hamluis, 06 June 2017 - 09:19 AM.

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#10 MDD1963

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Posted 06 June 2017 - 05:24 PM

I'd also drop to just one DIMM (alternating, to test each) in required slot, noting any change in behaviour; I've seen a bad RAM stick not even allow a system to even begin power on at all when installed.....( was a dual Xeon based rig, however)

 

Assuming no damage to cpu or socket, or spillage of conductive material onto/into same, were I a Vegas odds maker, I would have place failure odds/probabilities at about:

 

45%--mainboard failure

45%--PSU failure

8%--gpu (until it is removed, can't rule it out being shorted, bricking system while inserted)

1%--shorted USB/SATA headers (disconnect everything, even all miscellaneous fans, not relevant to hardware required for simple POST)

<1%--actual hard cpu failure


Asus Z270A Prime/7700K/32 GB DDR4-3200/GTX1060


#11 MDD1963

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Posted 06 June 2017 - 05:30 PM

Unfortunately, the GPU being only 1 day, 1 week, or only 1 year old does not eliminate it from failure possibilities. Most components that fail were usually 'fine last week' :) 

 

if system still won't POST (if your mainboard/cpu support integrated video, or if not, try another GPU?), now can be sure GPU not currently causing any remaining issues.


Asus Z270A Prime/7700K/32 GB DDR4-3200/GTX1060


#12 Kilroy

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Posted 07 June 2017 - 01:56 PM

From the LED flashing I'd suspect the power supply.






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