BSOD after computer has been off for 12+ hours

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  1. Posts : 25,847
    Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64
       #11

    I pat you on the back. You have doing a lot of testing. I think I understand what you have done and in what order. I will wait for your test results.
      My Computer


  2. Posts : 28
    win7 64 home premium
    Thread Starter
       #12

    I think I have found a defective Dimm. It fails if you have it cold and put it into the computer by itself on memtest+. if you put it in as dual channel, it tests fine. if you let it warm up and test it even by itself, it tests fine. Guess it's getting shipped back to GSkill as defective and get them to replace it. I will test the rest of the memory and then give it a try rebuilding tomorrow. Will know if it's solved next week I guess to give me time to re-build and then wait my 12 hours to see if I get the errors on a cold startup.

    Thanks for the help.
      My Computer


  3. Posts : 28
    win7 64 home premium
    Thread Starter
       #13

    Not so fast... the plot actually thickens.

    So I tested my Dimm's last night, and the first one had an error on it. So I flagged that one with an 'X' so that I could keep check on it. The other 3 dimm's all checked out perfectly fine. I went to bed.

    Now it's morning, and I powered up the computer with the 4th Dimm still in it that checked out OK last night. I had my memtest+ CD in the drive, and it boots up into testing. The Dimm that checked out perfectly fine last night, Fails horribly this morning. Like in the first test it gets 100+ errors.

    So I turn off the computer before the first check is even completed, and pull the 4th Dimm out and put back in the one that I marked with the 'X'. It checks out perfectly fine for 4 tests. So I put back in the 4th Dimm that worked fine last night, but failed first thing this morning, and re-checked it, and now it's perfectly fine.

    The variable now is the temperature of the motherboard, as when you do memory tests it would generate heat. A Dimm sitting on a table would be at room temp, so putting that Dimm into a computer, it would be at or close to room temp for the first pass and heat up from there. If it passes when the CPU/MB is hot, but fail badly when the CPU/MB is cold (like after 8 hours turned off) then the issue probably is not in the memory.

    This has got me thinking. I had the exact same problem with my last CPU/MB in that it would fail when cold but work fine when HOT. It would BSOD on startup that could be dumping corruption onto the hard drive that would get it to BSOD from that point onwards. When you install, you are heating up the computer, so it would install fine and stay working as long as you don't power down and let the computer cool down.

    Logically, if two different motherboards do the same thing, then it's very unlikely that it's the motherboard at fault. Perhaps its the case it's mounted in that is not flat, and the distortion of the mounted motherboard is enough to cause errors when it's cold, but as the motherboard heats up this fixes itself??

    Does that sound like a plausible problem? I guess I could try doing memory tests from cold without the case. ie have the motherboard sitting on a antistatic bag on a desktop and see if I can get my memory to fail from cold.

    How is that for a way out there problem???
      My Computer


  4. Posts : 25,847
    Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64
       #14

    I like the idea of testing with motherboard out of case. Get a window fan handy so you can do test with different amount of cooling. Things to think on.
    1. A computer will go back to ambient temp in less that a hour so I don't get the 12 hour thing.
    2. Quality of case maters; the way the motherboard mounts is critical. One stand off in the wrong place can distroy computers or do crazy things. A motherboard that is not tightened down evenly can also cause crazy problems.
    The I/O Panel where it goes through the case in the back of the case can cause a twist. If that hole in the back of the case is off a little can cause a twist of the motherboard. Cheep cases are cheep.
    3. We cant't see your computer and instulation properly even with pictures. Your Specs, test and reports, observation, is what we got to work with.
    4. Never assume their is only one problem.
      My Computer


  5. Posts : 28
    win7 64 home premium
    Thread Starter
       #15

    I thought I'd give a different thing a try.

    1. I removed the CPU cooler from my new CPU/MB and moved it over to the CPU/MB.
    2. I removed all but the 4 corners of the offset posts out of the case that hold the motherboard to the case.
    3. I cut up and made some rubber washers from an old bicycle innertube for the 4 remaining posts
    4. Put the case together and gave it a test with one of my original Seagate harddrives that I had installed windows 7 for this CPU/MB combination


    Powered it up and it worked without a single error. I am stress testing it right now to see if I can get it to BSOD.. but the ultimate test is turning it off tonight and seeing if it will work tomorrow morning.

    I think it was that the case is twisted slightly and/or one of the offset posts is either too hight/low and is deforming the motherboard just enough to cause memory read errors on startup from cold. This is trashing the boot drive with errors and giving me the BSOD. With just the outside edges supported, the motherboard can lay totally flat now and the errors seem to have gone away.

    Now I have an extra i5, Asus P8B75M, Saphire HD5670, SSD and Corsair TX650. The only thing I am missing is a case and some RAM to build a 3rd computer.

    Will post a follow up next week if it's all stable.

    Matt.
      My Computer


  6. Posts : 25,847
    Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64
       #16

    Be sure to get back to us on this crazy problem.
      My Computer


  7. Posts : 28
    win7 64 home premium
    Thread Starter
       #17

    Nope.. Not fixed.

    On the rebuilt AMD FX 955 machine, it works fine unit you turn it off for at least 8 hours.

    I rebuilt Win7 from my install DVD, and got it to install all the updates, and loaded the lastest motherboard support drivers for the HD4000 onboard chipset. If I turn the computer off and back on again, FINE. If I turn it off for 2-3 hours.. FINE. I turned it off and went out with the family to the beach and came back 8 1/2hours later. BSOD.

    To add even more fun. I get a STOP 0x19 in safe mode when i try and run the SFDiagnoticTool program to get the MSInfo.

    I would really appreciate if someone can look at these dump files and give me an idea as to what is crashing. After installing the motherboard with minimal offset mounting bolts, I can't get the memory to fail in memtest+

    I don't know what to test now. I need a starting point.
      My Computer


  8. Posts : 2,913
    Windows 7 Ultimate x64 SP1
       #18

    I'm assuming that you visited the motherboard manufacturer's website and downloaded the correct drivers, and you also checked for BIOS updates and flashed to the newest revision, and you loaded the default BIOS settings, followed by the optimal settings, and ensured the correct settings were chosen for your hard drive (AHCI/SATA/etc). I also assume you did the same for your other hardware. If you did all of that, then...

    Since this started immediately after you built the system, I believe you have a hardware issue. Start by removing the motherboard from the case and putting in on something that electrically isolates it (like a piece of plywood, etc). Also remove the power supply, then connect it to the motherboard. Connect only the power button from the case to the motherboard. Connect the video card, keyboard, and mouse, and the hard drive. Boot the system and see if you have BSODs.
      My Computer


  9. Posts : 28
    win7 64 home premium
    Thread Starter
       #19

    I ended up taking the motherboard out of the case, and it still game me the error after being off for the night. So I put in a single Dimm and left it off for 5 hours then did a memtest+ and found that in actual fact, there were two dimm's defective from cold.

    I took the memory that I knew worked from out of my work PC and put it into this computer, and it checked fine. Put everything back into the case, and it boots fine now.

    I have opened a case in the update forum as now I can't get the windows update to run.. but that's another story.
      My Computer


  10. Posts : 25,847
    Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64
       #20

    Two bad ram sticks. You are so lucky. Thanks for letting us know. Happy computing.
      My Computer


 
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