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Thread: Pc won't boot out of safe mode AND intermittently restarts.

  1. #1
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    • holy god of nil's system
      • Motherboard:
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    Pc won't boot out of safe mode AND intermittently restarts.

    My old PC which I don't use much has developed some strange issues which I'm at a bit of a loss about. First background;
    I'm running these specs with windows 7:
    i5 2500
    Asus p8h67
    16gb DDR3
    1TB Samsung + 120GB Sandisk Extreme
    Sapphire 7850 OC
    Corsair HX450
    Silverstone SG03

    And until last week it seemed rock solid. I had windows 10 scheduled to install but the computer was off at the time. Anyway a couple of days ago I booted the PC and went downstairs, when I came back up it was frozen on a the desktop with the Windows 10 program showing 50 mins to install (or download, I'm not certain) and a driver update showing it was ready (I think either from my AMD for the graphics card or avast).

    I powered down using the case button and ever since have had the following issues: Windows won't boot normally or in repair mode but will boot in safe mode and safe mode with networking (I have done a system restore to a time before the windows 10 was scheduled). As well as this the computer intermittently cuts out like it has lost power and then immediately starts back up.

    I have done the following things: reseated the ram, checked temps which all seem fine, removed the graphics card, checked the bios settings (date and time etc are all fine) and generally had a check of cables etc.

    My assumption would be something is shorting / the psu is dying BUT why would it not boot except in safe mode then? I'm confused and any ideas are welcome.

  2. #2
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    • holy god of nil's system
      • Motherboard:
      • Asus p8h67
      • CPU:
      • i5 2500
      • Memory:
      • 16gb DDR3
      • Storage:
      • 1TB Samsung + 120GB Sandisk Extreme
      • Graphics card(s):
      • Sapphire 7850 OC
      • PSU:
      • Corsair HX450
      • Case:
      • Silverstone SG03

    Re: Pc won't boot out of safe mode AND intermittently restarts.

    It also seems to be the booting which causes the PC to cut out, as it is solid on bios / windows memory checker etc pre-boot.

    Note that it doesn't always cut out, though it seems to be doing it more and more quickly now.

  3. #3
    root Member DanceswithUnix's Avatar
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    Re: Pc won't boot out of safe mode AND intermittently restarts.

    Sounds like PSU or motherboard to me.
    Running memtest86 is usually an easy and useful test on things like this as well, as faulty ram could fit.

    Do you have parts you can swap out?

    My recent motherboard failure was similarly strange. Once booted the PC would stay up for ages, but it didn't want to reboot and would take increasing numbers of goes. Booting into Linux was more successful than Windows, perhaps because Windows is on SSD so the machine gets fed with stuff faster. Finally it wouldn't recognise anything on the SATA ports but would boot OK from USB stick. I can only guess that the south bridge was peeling off the PCB or something.

    PCs are complex, and not always obvious.

  4. #4
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    • holy god of nil's system
      • Motherboard:
      • Asus p8h67
      • CPU:
      • i5 2500
      • Memory:
      • 16gb DDR3
      • Storage:
      • 1TB Samsung + 120GB Sandisk Extreme
      • Graphics card(s):
      • Sapphire 7850 OC
      • PSU:
      • Corsair HX450
      • Case:
      • Silverstone SG03

    Re: Pc won't boot out of safe mode AND intermittently restarts.

    Yeah that more or less mirrors my thoughts, it now seems to be failing so quickly and regularly that running memtest won't be an option.

    Unfortunately I don't have spares, a recent house move put pay to the majority of my old bits and as it's an mATX 1155 mobo I need it may prove challenging to pick up one easily.

    BTW any know if a PSU tester would provide any useful data about whether my unit is failing, I'm presuming not?

  5. #5
    root Member DanceswithUnix's Avatar
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    • DanceswithUnix's system
      • Motherboard:
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      • CPU:
      • FX-8350
      • Memory:
      • 16GB ECC 1333
      • Storage:
      • 500GB Linux, 1TB Games (Win 10)
      • Graphics card(s):
      • Asus Strix RX Vega 56
      • PSU:
      • 650W Corsair TX
      • Case:
      • Antec 300
      • Operating System:
      • Fedora 28 + Win 10 Pro 64 (yuk)
      • Monitor(s):
      • Benq XL2730Z 1440p + Samsung 2343BW 2048x1152
      • Internet:
      • Zen 80Mb/20Mb VDSL

    Re: Pc won't boot out of safe mode AND intermittently restarts.

    1155 is still OK to get hold of, albeit with limited choice. I bought my mum something like http://www.ebuyer.com/429725-asrock-...board-h61m-dgs for a Xeon that got thrown out at work to go in. That only has 2 DIMM slots, but pretty good for the price if you don't want to overclock.

    I bought a PSU tester some time back. Haven't had a PSU fail since, so you could call that a success Given how cheap they are it could be worth a punt on one.

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    Re: Pc won't boot out of safe mode AND intermittently restarts.

    Sounds like windows is corrupted and its put its self in a boot shutdown loop

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  8. #7
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    • holy god of nil's system
      • Motherboard:
      • Asus p8h67
      • CPU:
      • i5 2500
      • Memory:
      • 16gb DDR3
      • Storage:
      • 1TB Samsung + 120GB Sandisk Extreme
      • Graphics card(s):
      • Sapphire 7850 OC
      • PSU:
      • Corsair HX450
      • Case:
      • Silverstone SG03

    Re: Pc won't boot out of safe mode AND intermittently restarts.

    I thought that but now I can't even boot into ultimate boot cd (and even when I can I can't use my keyboard despite legacy support being on). I'm chalking this one down to the mobo currently as dances says.
    Last edited by holy god of nil; 20-10-2015 at 05:24 PM.

  9. #8
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    • holy god of nil's system
      • Motherboard:
      • Asus p8h67
      • CPU:
      • i5 2500
      • Memory:
      • 16gb DDR3
      • Storage:
      • 1TB Samsung + 120GB Sandisk Extreme
      • Graphics card(s):
      • Sapphire 7850 OC
      • PSU:
      • Corsair HX450
      • Case:
      • Silverstone SG03

    Re: Pc won't boot out of safe mode AND intermittently restarts.

    I never did get round to fixing this, it's a very frustrating problem. Just took delivery of a new PSU and mobo for testing purposes, think I should get some new DDR3 too mind, though it seems more expensive now than it was when I last upgraded!

  10. #9
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    • holy god of nil's system
      • Motherboard:
      • Asus p8h67
      • CPU:
      • i5 2500
      • Memory:
      • 16gb DDR3
      • Storage:
      • 1TB Samsung + 120GB Sandisk Extreme
      • Graphics card(s):
      • Sapphire 7850 OC
      • PSU:
      • Corsair HX450
      • Case:
      • Silverstone SG03

    Re: Pc won't boot out of safe mode AND intermittently restarts.

    Also I can't boot from my (legit) windows CD - It just sits on the loading windows screen, I can't fathom that one.

  11. #10
    Senior Member kalniel's Avatar
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    Re: Pc won't boot out of safe mode AND intermittently restarts.

    Quote Originally Posted by holy god of nil View Post
    Also I can't boot from my (legit) windows CD - It just sits on the loading windows screen, I can't fathom that one.
    That could be a drivers thing, particularly storage eg sata2 or AHCI.

  12. #11
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    • holy god of nil's system
      • Motherboard:
      • Asus p8h67
      • CPU:
      • i5 2500
      • Memory:
      • 16gb DDR3
      • Storage:
      • 1TB Samsung + 120GB Sandisk Extreme
      • Graphics card(s):
      • Sapphire 7850 OC
      • PSU:
      • Corsair HX450
      • Case:
      • Silverstone SG03

    Re: Pc won't boot out of safe mode AND intermittently restarts.

    One day hopefully I'll be able to boot into something for long enough to think about fixing that!

  13. #12
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    Re: Pc won't boot out of safe mode AND intermittently restarts.

    If you can get in safe mode can you use "chkdsk" or "sfc /scannow" to check the hard drive for corruption that could prevent the OS to properly load?
    2nd computer gigabyte P965ds3p, 7770 E2140@2.9ghz, corsair HX520 6 years stable, replaced now with E8400@3.9ghz and will overclock more when I'm bored.

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    Re: Pc won't boot out of safe mode AND intermittently restarts.

    Have you tried booting from a CD with the hard drives disconnected, in case one of those is faulty.

  15. #14
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    • holy god of nil's system
      • Motherboard:
      • Asus p8h67
      • CPU:
      • i5 2500
      • Memory:
      • 16gb DDR3
      • Storage:
      • 1TB Samsung + 120GB Sandisk Extreme
      • Graphics card(s):
      • Sapphire 7850 OC
      • PSU:
      • Corsair HX450
      • Case:
      • Silverstone SG03

    Re: Pc won't boot out of safe mode AND intermittently restarts.

    Thought I'd fixed it with new MB, checked the HDDs and they seemed fine - fresh install of windows, all looking rosy then bang blue screen of death and it's back to its old tricks. I am officially stumped, I guess this leaves RAM all over again (anyone got a stick or two of DDR3 I could borrow to test with?) or CPU?!!

    EDIT:

    Apparently my CPU is running at 99c, tempted to chalk that one down to a borked sensor as the air coming out feels nice and cool but hmm...
    Last edited by holy god of nil; 17-12-2015 at 12:36 AM.

  16. #15
    Senior Member kalniel's Avatar
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    Re: Pc won't boot out of safe mode AND intermittently restarts.

    Quote Originally Posted by holy god of nil View Post
    Apparently my CPU is running at 99c, tempted to chalk that one down to a borked sensor as the air coming out feels nice and cool but hmm...
    If the air's cool then you've got a problem... you want the air to be carrying the heat out.

  17. #16
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    • holy god of nil's system
      • Motherboard:
      • Asus p8h67
      • CPU:
      • i5 2500
      • Memory:
      • 16gb DDR3
      • Storage:
      • 1TB Samsung + 120GB Sandisk Extreme
      • Graphics card(s):
      • Sapphire 7850 OC
      • PSU:
      • Corsair HX450
      • Case:
      • Silverstone SG03

    Re: Pc won't boot out of safe mode AND intermittently restarts.

    Aye - I will resit the heatsink tomorrow just in case.

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