Solved Machine hang up suddenly, but not blue screen

October 2, 2012 at 01:55:02
Specs: Windows 7, AMD6000/4G DDR2 800
My m/c can start up and function well for a while for 10 min. or more, then hang up suddenly. This happens when the machine is idle for a few days. If it doesn't hang up and keep working day by day it doesn't get any problem.What is the problem on: M/B, RAM or Power Supply?


See More: Machine hang up suddenly, but not blue screen

Report •


✔ Best Answer
October 11, 2012 at 11:40:57
It certainly seems odd that the 12V rail is that low. The symptoms fit reasonably well with a faulty PSU. I've just checked mine and it is showing 12.77V. So off the top of my head I would say the PSU is highly likely to be the culprit. Nobody can be "absolutely certain" because there could be a PSU 12V feed plug and socket issue or even an abnormally high current drain from the mobo causing the voltage to fall.

If you take out the PSU maybe your local computer store will check it out for you, otherwise it's a case of changing it and hoping for the best.

Always pop back and let us know the outcome - thanks



#1
October 2, 2012 at 05:30:43

Report •

#2
October 2, 2012 at 08:09:38
M/B is J&W(brand) RS780UVD-AM2(model)

Report •

#3
October 5, 2012 at 14:43:35
Could be oxide on edge connectors. Try cleaning RAM edge connectors with a pencil eraser then inserting the sticks a few times to clear oxide off the sockets.

While you are in there do the same for any other edge connectors and reseat all plugs and connectors.

Always pop back and let us know the outcome - thanks


Report •

Related Solutions

#4
October 8, 2012 at 07:48:22
Try your method to plug and unplug several times, and takes longer time before hanging. Sounds to the point but the oxide stuff still there ? Any more efficient way to remove the oxide? Can I use WD-40 to spray on the slot , then clean and dry afterwards?

Report •

#5
October 8, 2012 at 08:25:35
Did you use pencil eraser on the edge connectors first?
I've never found it necessary to use liquid.

I would NOT use WD-40 because it's oily.
Intermittent faults can be a pig to track down.

Could just be a coincidence that the problem has reduced.

Always pop back and let us know the outcome - thanks


Report •

#6
October 8, 2012 at 22:37:50
Thanks very much. Have try method plug and unplug then erase the RAM gold fingers for numerious time. Unfortunately the problem still there. What can try next? Please help

Report •

#7
October 9, 2012 at 03:02:24
What I have done these days:
1. Recover the O/S to the status that I am sure it works.
2 Win7 recognises there are 4G RAM installed.
3. Run Rightmark mem test and it indicates there are 4G RAM
With 1 it confirms the O/S is free from virus.
With 2 & 3 can it say the 2 pieces the RAM(2 pcs X 2G) are function well, (include the plug slots)?
The RAM are done with plug and unplug with eraser scratching every interval.
The problem happened in this way: start, go into win7 , work for a while(about 5 -10 mins) then hanging, or sometimes but very few with crashing screen.

Report •

#8
October 9, 2012 at 09:47:59
Forget the RAM connectors, what you've already done is more than sufficient. If you have run a full mem test then you can assume the RAM itself is OK too.

The problem with these symptoms is that we don't even know for certain whether it is a software or hardware issue.

Overheating can cause freeze up's but that would normally happen after a period of running.

You could type msconfig in the Run box and untick things in Startup to see if you can find one of them that is causing the issue. A bit "hit or miss" I'm afraid but about all I can suggest without getting my hands on the computer.

See if this hang happens when you are doing any particular thing.

When you said "This happens when the machine is idle for a few days." did you mean with it left running or switched off?

Always pop back and let us know the outcome - thanks


Report •

#9
October 9, 2012 at 20:57:44
1 Idle for a few days means shut down and switched off.
2. I recover the O/S to the time whenever I can run the system in stable(without hanging). My system installed with Tuneup Utilities and I always keep the startup with minimum software requirements.
3. Overheating sounds irrelevant, firstly it never happened before and the time for running before hang is only a few mins. I put eyes on the m/c when testing. Fans are running in normal. Further on if the m'c is overheated and forced to shut down, it will be locked for a while until it cools down before can restart. But I can restart the m/c immediately after power off and on to reset the hanging.
4. I tried these few days. Once a time I can success to recover the O/S with Acronics (takes about 10 mins or more ). Another time I just want to copy some files from HDD to flash drive, just a few mins it hanged(that time no software should be running unless the necessary like explorer etc. Another instance was I tried to update the Microsoft security essentials. Download wad completed and it was hanged during installing(also in a matter of a few min after statup)
4. I notice there was a very rare case happened, but only once and never happened since then. At that time I found the clock shown with an owful time and date (I can't remember exactly, somthings like year1802 and so on) But since then it shows with correct date and time.

Report •

#10
October 10, 2012 at 12:07:02
I note what you are saying about the overheating and agree that from what you describe it sounds unlikely. Just the same, if you are inside the computer there would be nothing lost in cleaning up the vents and CPU heatsink against this slight offchance.

I note that you have minimised startup programs but the reason I suggested unchecking in msconfig startup was to see if there is a problem with one of these which is causing the issue.

When the clock shows silly times it is almost always due to the BIOS/CMOS battery failing, although this doesn't fit very neatly with the other symptoms you are describing.

Maybe there is more than one problem.

The BIOS/CMOS battery apears to be one of those coin shaped types that you just pop-in. I would change that for starters as they are very cheap and easy to fit. The motherboard manual (showing the battery as BT1) can be downloaded here:
http://www.jwele.com/motherboard_de...
The battery is probably a CR2032 lithium, which is widely available.

If that doesn't help then try to see if knocking out anything from msconfig helps at all.

What we need is to get some sort of handle on this issue but it is clearly not going to be too easy.

Always pop back and let us know the outcome - thanks


Report •

#11
October 11, 2012 at 05:50:42
I change the battery CR2032 today and suprising it gives me a long run for few hours w/o hanging. When I just yield " yeah" but it comes with hanging finally after 3-4 hours running. I catch the chance to run the PC wizard and here are some results I get:"SYSTEM 31degreeC(same underneath ) CPUIN 41C, AUXTIN 52.5C, CPUFAN 5625,CORE1 41.2C,CORE2 40.5C,PROCESSOR VOLTAGE 1.42V, VIN1 0.96V, +3.3V 3.3V, +5V 4.94V, +12V 7.97V, HDD1 46C,HDD2 49C .
Here I find the temp sounds in a normal range, but the most unusual is the +12V. Should the +12V to be +/- a decimal and not be as deviated as low as 7.97V shown here. Does it mean the power supply is mulfunction with this 7.97V . Would this related with the problem I suffered? If I change the power supply, would the problem be fixed?

Report •

#12
October 11, 2012 at 11:40:57
✔ Best Answer
It certainly seems odd that the 12V rail is that low. The symptoms fit reasonably well with a faulty PSU. I've just checked mine and it is showing 12.77V. So off the top of my head I would say the PSU is highly likely to be the culprit. Nobody can be "absolutely certain" because there could be a PSU 12V feed plug and socket issue or even an abnormally high current drain from the mobo causing the voltage to fall.

If you take out the PSU maybe your local computer store will check it out for you, otherwise it's a case of changing it and hoping for the best.

Always pop back and let us know the outcome - thanks


Report •

#13
October 11, 2012 at 12:12:18
Thanks for your persistent help. It seems that you agree that the too low 12V rail fits with the symptoms. I prepare to change with a new PSU. But what make me feel uncomfortbale is "an abnormally high current drain from the M/B causing the voltage to fall". Hope this is not the case otherwise I need to change the M/B either.
I would like to conclude the symptons again, and may you help to see if it fit with the low 12V rail, which means how much the probability to be the only and last the defective parts I needed to replace:
1. Run normally w/o any even a piece abnormal.
2. Idle (switch off) for few days resulting with instability. First come with blue screen to dump data off, then comes with sometimes blue screen but not dumming and/or crashing scrren, or dead screen the hanging. The interval of the running in stable sounds shorter and shorter.
3. I have a strong feeling(just a feeling w/o quantative proof)the time to go thru the BIOS setup, Boot manager, then the windows environment needs time longer and longer. Will these give further support on the PSU faulty?
4. How surprise the system persists to run a longer time before hanging for few hours after I replace the cmos battery CR2302 this day? What symptoms is this related?
Anyway thanks for you guy the assist honoured. Appreciate.

Report •

#14
October 11, 2012 at 12:34:41
The abnormaly high current gain was only suggested as a "possible" reason for the low voltage. However, mobo faults usually show more serious and consistent symptoms than those you have given.

When faults are intermittent they always create confusion. Even without doing any repairs the time interval between issues can sometimes change. It is therefore difficult to be certain whether or not the CR2032 was faulty. More than one fault is possible.

PSU is my best guess - can't say much more than that without either a bench test or trying a replacement.

Always pop back and let us know the outcome - thanks


Report •


Ask Question