Random inconsistent Restarts

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seniorhobo

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Jul 10, 2015
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Hi guys,

I have been having a problem with my computer randomly re-booting/losing signal completely for some time now. The symptoms are as follows:

- The computer will randomly reboot or completely shut down. When it completely shuts down my monitor displays "No signal" and I cannot reboot the computer again for about 5-10mins.
- These restarts can happen at random intervals, sometimes I will get numerous in an hour, sometimes I could go for a week without any.

I originally thought it was a GPU problem as I kept losing signal to my monitor. I had my GPU tested by a friend who said it wasn't working on their rig either. Great, I replaced the GPU and it seemed to be fixed....not so lucky, same thing started happening again about a week after I got a new GPU. Long story short I have replaced almost all of the components in my computer from when I started getting the problem. The only components in my new system that were in the old one are 2x SSD, 1xHDD & 1x Optical drive. My operating system is Win 7 64 bit and is installed one one of the SSDs (64gb).

My question is this....Is it possible that the remaining ssds/hdd are causing the problem? Could it be that the SSD that the OS is installed on has a fault and is losing power or something? This is the only conclusion I can come to as I have replaced all of my other components with new parts and I still have EXACTLY the same problem as I did with my old system. The SSD that the OS is installed on is about 5-6 years old. It is extremely frustrating that I cannot get this fixed.

Also I have tested my monitor and all my connection cables on 2 other systems and they both work perfectly.

Thanks,

Jim.


 
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Paul NZ

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Sep 15, 2014
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Look in event viewer see if there are any errors about the time it happened

See what they say

Does windows crash or just reboot?? Constant rebooting without crashing can be a faulty PSU

Since the hdds were in an old system. Did you do a reinstall of windows, when you put them in the new system?

If this mobo isnt the same as the old system?? If you didnt you should

 
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seniorhobo

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Jul 10, 2015
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I have replaced all of the components with new ones completely different to the ones I had before. The system doesnt crash, i.e. no BSOD or anything, it just either loses signal to the monitor, reboots or shuts down completely. I have tested my new PSU on multiple other systems and had no problems, I have also breadboared my new Mobo with and without ram and it runs stable with no problems. I haven't tried re-installing windows yet as I have only recently started to suspect the SSDs/HDD. I dont see how it could not be a problem with the drives as everything else is completely new and different, but I dont really know how to test the drives.

I will try a re-install of windows and check event viewer logs as a last ditch attempt, otherwise I'm just considering bringing it to a repair shop and paying someone to make it work, I am so fed up!
 
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Paul NZ

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Sep 15, 2014
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The problem may not be with the hdds, but if the hardware on the old system isnt the same as the new, you will have probs.

Because theyve got diff hardware / chipset and drivers

Depending on what the brands/models of the hdds are, see if there are any firmware updates for any of them
 
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seniorhobo

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Jul 10, 2015
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I find it hard to believe that the problem isnt something to do with the hard drives. How likely is it that I replace my motherboard, cpu, heatsink, gpu, psu & ram with new components that are new and I still have exactly the same problem as I did with my old system (5+ years old components)? If I had a new or different problem compared to what I had with all my old components I could begin to believe that there could be something wrong with ny new hardware.

Also @fisco, I have tested my cpu and it does not overheat. I have also stress tested my mobo +cpu + ram on another system and it runs completely stable with no problems. I had a friend recommend that I RMA the mobo + cpu, which I did and was subsequently told that they were tested and worked perfectly. I'm going to focus my efforts on trying to test the HDDs now, I was just curious if anyone had experienced anything like this before and was able to attribute it to their HDDs/SSDs.

 
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fisco

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Mar 14, 2013
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Try another power supply. Many power supplys have protections and restart the computer when demand is too high or is overheating
 
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udg

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May 10, 2010
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Computer rebooting could be a number of things but rebooting and not going back on for 5-10 mins to me looks more like CPU overheating, all computers have a sort of fail-safe where if the CPU is to hot it will not allow the system to power up until the CPU temp has went down to a safe level.

This is why some people with an overheating CPU can switch their computer back on a few times before it finally refuses to switch back on as the CPU is getting hotter and hotter each boot-up.

Take the side from your case off and point a desktop fan at the motherboard and try running the computer, you may have replaced the Heat-sink and Fan but the replacement may still be a little weak or the environment may be to hot for it to work as stated.
 
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seniorhobo

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Jul 10, 2015
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I have tried and independantly tested 2 PSUs on my system, both are working perfectly and I still get the same problem on my system regardless of which power supply I use. The CPU is not over heating, I have reseated it a number of times and stress tested it through another rig (with the same mobo, ram & PSU).
 
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latifabbasi

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Oct 21, 2012
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seniorhobo
My problem is pretty much as yours except mine just restarts and doesn't shut down completely. My OS is also on the SSd and I too have been suspecting it may be due to SSD but again I'm not sure. Most of the threads I have seen mentions PSU. I just don't know what to do. If you have found the real cause of your problem, would you be kind enough to share it?

Thanks
 
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