Trying to pinpoint problem

Tinchote

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Jul 8, 2013
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Hi all, this is a Windows 7 PC. Two days ago it started freezing during regular use. No recent hardware or software changes.

Over the last two days, I got many blue screens, most for different alleged reasons (I saw stop codes 1A, 1E, 24, D1 and probably others too: these range from filesystem problems to memory problems,etc.). Other times the computer would suddenly freeze. Other it would reboot.

With such a variety of symptoms and the computer running normally otherwise, I assumed this is some hardware problem like faulty memory. The problem is that I did try substituting the DIMMS but the problems kept appearing (and I run memtests that reported no problems). Then I removed one of the video cards, then the other, and every time the computer would fail.

I'm running out of options, so I'm thinking maybe it is the motherboard itself? The question is whether there is anything else I can try before I start buying stuff without really knowing what is wrong. I wouldn't want to throw the whole system out.

Any suggestions will be really appreaciated.
 
Solution
1. If those temps are at idle, I think you are too hot.
Try taking the side covers off and directing a house fans at the innards.
A decent cooler might give you 10c- 15c. over ambient
2. Rocketfish is a tier 5 unit(not recommended, replace asap) in this list of quality.
http://www.eggxpert.com/forums/thread/323050.aspx
Cheap psu's will go bad quicker and not deliver full power. See if you can borrow a good psu to test with.

Tinchote

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Jul 8, 2013
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The system has been running trouble-free for more than a year since I last changed something, so I would think it is not the psu. Dust build up is certainly something I need to look into. Malware is always a possibility, but the computer has an updated antivirus plus firewall; and the freeze has also happened during Windows start up.

Specs:

PSU: Rocketfish 700w
Motherboard: ASus M4A79XTD EVO
Processor: AMD Phenom II X4 955
Memory: 8GB
HD: WDC WD20EAR (2TB)
GPU1: GeForce 9400GT (512MB)
GPU2: Ati Radeon (512MB)
 

Tinchote

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Jul 8, 2013
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Now even if I leave the computer on the BIOS setup screen (where I can monitor the temperatures) the screen will go black after a few minutes.

That said, the BIOS report CPU temperature at around 60C and motherboard at 46C, so that would discard cooling, too?
 
1. If those temps are at idle, I think you are too hot.
Try taking the side covers off and directing a house fans at the innards.
A decent cooler might give you 10c- 15c. over ambient
2. Rocketfish is a tier 5 unit(not recommended, replace asap) in this list of quality.
http://www.eggxpert.com/forums/thread/323050.aspx
Cheap psu's will go bad quicker and not deliver full power. See if you can borrow a good psu to test with.
 
Solution

Tinchote

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Jul 8, 2013
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Thanks for the suggestions. I'll definitely explore the psu side. Now, this system has been running perfectly for at least a couple years, and suddenly started acting up two days ago. Can a psu cause these random failures?

I will also explore the cpu cooling. The cooler seems to be working, but I haven't checked the thermal grease.
 

tardis42

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Jul 7, 2013
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ANY component can work for ages and then fail - even a PSU. However, I agree with geofelt that something is going wrong with your cooling. 60 degrees is way too hot for a CPU when you've just booted into BIOS. I'd suggest trying that big-fan-aimed-at-the-open-case trick, with the PC running in BIOS for a while. Keep an eye on the temperature. If the temp stays low but your computer still clicks off at some point, then it's not (or at least not exclusively) a heat issue. If, on the other hand, you're able to keep the temperature down and your PC stays stable in BIOS, try it in Windows and consider replacing the CPU cooler.
 

Tinchote

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Jul 8, 2013
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So I ended up changing the cpu cooler, and so far that seems to have made the trick. I'll still let the computer run for a few more hours before really claiming it is solved, but everything seems to be perfect now. Thanks!
 

Tinchote

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Jul 8, 2013
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Thanks, it seemed to be the cooling. Regarding the psu, it is still working fine; and I would like to know why it made it to the 5th tier in that list you quoted. In particular, in light of this review
 
Does not sound like replace ASAP either to me.
The review was not glowing, but not bad either.
Perhaps because the review was 5years ago and things have changed.
Since you have been running OK, and the psu is not overloaded or stressed, I would not worry too much about it.
 

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