System unstable with random freeze / BSOD after cold boot

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kkdon

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Apr 30, 2014
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Hi I have a Shuttle XPC SP35P2 Pro running intel P35 chipset and Windows 7 pro 32 bit with Core2Duo E6550 CPU. Machine is more than 6 years old but still performs well, other than the fact that recently for some reason it will freeze randomly or show BSOD when it cold boots after prolonged period of "off status".

It will usually take 2-3 power cycles in order to let it "warm up" and show stability in operation. The freeze or lock up can happen during BIOS set up as well or Windows safe mode.

I tried all the method of reinstalling, factory BIOS reset, flashing latest BIOS, cleaning registry and virus scan and memory test and smart HDD tests, etc. nothing is wrong. The operating temperature is all ok and within safety range.

And I know for sure temperature isn't an issue because this happens during the first few minutes usually after cold boot so temp isn't even high.

I'm wondering whether this is something to do with the motherboard or PSU. I think it's more likely with the PSU since it needs to "warm up" a few times?

Any Experts who might have insight to this I'll greatly appreciate. Many thanks!

Donald
 
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Waferthin

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Apr 16, 2014
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to me that sounds like a failing power-supply. just because if you have bad blocks of ram or mobo "generally speaking" your bsods wouldnt just go away. IF you have a failing capacitor in your psu then basically it could take a while to get the voltage it needs and could potentially not be giving your system the power it needs until as you say it "warms up" cheapest and easiest way to fix this is to buy a new psu seeings as actually repairing one is quite dangerous. Now on the other hand if your mobo could be failing if something was wrong with its power regulation circuit.. but generally with that you would get straight shutdowns as appose to bsods. the thing with the psu is over time if it is your psu it could quickly damage other parts in your machine. also for kicks Id run crystal disk on your hdd just in-case its physically failing or what ever hdd test you prefer


SO all in all I would prolly troubleshoot it as follows. HDD test if pass then move on to
POWERSUPPLY all you can do here is try a new psu in your system or try your psu in another system with the exact same specs the latter being unlikely
if psu and hdd both pass that test then -> mobo in that case its new computer time.

NOW if your hdd fails you might need to check your psu and mobo as well because that failure could be caused by the failing psu/mobo
so basically check your basis but a faulty psu can cause complete system failure
 
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K

kkdon

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Apr 30, 2014
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4,510
Looks like replacing CMOS battery is the solution. Previously if I go to sleep or hybrid sleep it will not resume and stuck in BIOS post screen. After replacing battery so far no freeze nor BSOD and the sleep issue is also resolved.
 
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iganas

iganas

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May 16, 2014
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Actually replacing failed caps in PSU is not a big challenge, and can be done with any type of soldering iron, as the popped caps can be visually identified and unsoldered by heating up both its legs from under the pcb. A replacement cap can be easily found on any electronics enthusiasts shop or even ebay
 
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