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Thread: New system has boot loops




  1. #1
    Join Date
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    Default New system has boot loops

    Just finished my new quad core system build 2 weeks ago, and everything went very smoothly. I thought I was in the clear with no hardware problems until just now. The new system suddenly just displayed an all white screen and hung there. When I powered it off, and then powered it back on, it now just cycles between 5 seconds powered on, then 5 seconds powered off, over and over again by itself, never displaying anything on my monitor. I've never seen this before. What do you think is the prime candidate? The power supply, the system board, or another component? Any help is much appreciated.

    Here are my system specs. Everything ran fine for 2 weeks, so I believe all connections and configurations were initially OK.

    Antec Nine Hundred Black Steel ATX Mid Tower Computer Case
    GIGABYTE GA-EP45-UD3P [COLOR=blue !important][COLOR=blue !important]LGA [COLOR=blue !important]775[/COLOR][/COLOR][/COLOR] Intel P45 ATX Intel Motherboard
    EVGA 896-P3-1170-AR GeForce GTX 275 896MB 448-bit DDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card
    PC Power & Cooling S75QB 750W ATX12V / EPS12V SLI Certified CrossFire Ready 80 PLUS Certified Active PFC Power Supply
    Intel Core 2 Quad Q9650 3.0GHz LGA 775 95W Quad-Core [COLOR=blue !important][COLOR=blue !important]Processor[/COLOR][/COLOR] Model BX80569Q9650
    OCZ Reaper HPC Edition 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) [COLOR=blue !important][COLOR=blue !important]Dual [COLOR=blue !important]Channel[/COLOR][/COLOR][/COLOR] Kit Desktop Memory Model OCZ2RPR800C44GK
    Western Digital Caviar Black WD1001FALS 1TB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drives
    HP 22X DVD Burner Black SATA Model 1170i
    AuzenTech AZT-FORTE X-Fi Forte 7.1 Low Profile PCI Express Sound Card
    ZALMAN CNPS 9700 NT 110mm 2 Ball Ultra Quiet [COLOR=blue !important][COLOR=blue !important]CPU [COLOR=blue !important]Cooler[/COLOR][/COLOR][/COLOR]

    I tried the putting the RAM in one stick at a time and it didn't make any difference. (Side note, does this board power cycle like this if there is no RAM installed?) I tried removing all connections and devices to the motherboard except power and the CPU, and when I powered up, the system still cycled up and down like a yo yo. I used a power supply tester on my power supply and it checked out OK, so at this point I think it's either the CPU or the motherboard. I only have about 10 days until my 30 days are up at New Egg where I bought everything, so I am under the gun to get the right component replaced. Do you think it's the CPU or the motherboard? Thanks for your help.

  2. #2
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    Default Re: New system has boot loops

    Before you assume hardware failure try a CMOS reset and load proper BIOS settings.
    Happiness isn't something you experience; it's something you recall.

  3. #3
    Acebmxer's Avatar
    Acebmxer is offline Gigabyte Elite
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    Default Re: New system has boot loops

    First remove the power cord from the back of the psu if you haven't already. leave it disconnected for 15-20 min. While its disconnected use a jumper from a spare IDE hdd or cd-rom or screw driver something to short the clear cmos pins. try any where from 1 min - 1hr with pins shorted out. Then replug in the power cord to the psu and see if it boots. If it does, enter bios and chose load optimized defaults and press f10 to save and exit. Reboot loop is common but also not common. It real should not happen out of the blue but i can. Mostly happens when overclocking. Usually for me I just have turn the switch off on my psu for 5 sec flick it back on then press pwr button on case and it boots. Other think if the above did not help remove the internal battery for up to 2 hrs. read this bios-flashing-how-qflash-guide-27576/#post258596 scroll down a bit and there are directions to reset the cmos.
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    Samsung Green 8GB 2x4GB MV-3V4G3D/US DDR3 1.3v 30nn @ 2200Mhz 11-11-11-32 1.60v
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  4. #4
    Join Date
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    Default Re: New system has boot loops

    Thanks for the tips. I did try shorting the CMOS pins to clear CMOS, but I only did it for about 20-30 seconds. I didn't know you should keep them shorted for as much as an hour. I will try this when I get home tonight.

  5. #5

    Default Re: New system has boot loops

    what are your memory timings?
    i7 930 @ 4.2 ghz (200x21) 1.34 vcore 1.33 qpi
    Noctua U12P se1366 Push Pull w/scythe slipstreams
    6GBOCZ1333 @ 1600 - 9 9 9 24 1.64v
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  6. #6

    Default Re: New system has boot loops

    and be sure to put those system specs in your sig , much easier than having to post them every time . You will be asked for them most every time you make a thread regarding system trouble.

    I had a similar issue on my ex58-ud3r. It is all resolved now, but still does reboot loop every now and then. Very rare however. This may sound a bit strange but my solution to the problem was removing any mobo to case leads such as top usb ports, audio jacks, case fans, etc. Anything that connects the case to the mobo. I only use 2 of the mobo fan headers for my noctua cpu cooler fans and that is it.

    Give that a try, see what happens. Its very easy and quick to do and may very well solve the issue, it solved mine. For whatever reason.
    i7 930 @ 4.2 ghz (200x21) 1.34 vcore 1.33 qpi
    Noctua U12P se1366 Push Pull w/scythe slipstreams
    6GBOCZ1333 @ 1600 - 9 9 9 24 1.64v
    Gigabyte EX58-UD3R f11
    Corsair tx750 PSU
    EVGA GTX260 SC
    Intel SSD80GBG2C1 OS/Apps
    WD Caviar Black 500gb Data
    ASUS Xonar DX
    Klipsch Promedia 2.1
    CM690 Case 3 in 3 out
    Windows 7 64bit

  7. #7
    Acebmxer's Avatar
    Acebmxer is offline Gigabyte Elite
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    Default Re: New system has boot loops

    Quote Originally Posted by whit80 View Post
    Thanks for the tips. I did try shorting the CMOS pins to clear CMOS, but I only did it for about 20-30 seconds. I didn't know you should keep them shorted for as much as an hour. I will try this when I get home tonight.
    It all depends if it actually clears the cmos. If it did get cleared by the jump it should give you a check sum error and make you press f1 to continue or f2 to enter setup. If you did not get a message like this it did not clear the cmos and you need to leave the jumper on longer try pressing the power button or holding for a min or 2 to drain all power to cmos.

    Edit - Like said above please list your full system specs in your sig and please not which revision of the board you have 1.0, 1.1, 1.6. This is asked because version 1.6 uses a diffrent bios then 1.0, 1.1 do. Also might need to update to latest bios version which is F10e for 1.0-1.1 and FDa for 1.6. Link for it is in my sig.
    Last edited by Acebmxer; 08-29-2009 at 05:46 AM.
    Main Rig
    Gigabyte z87x-OC
    Haswell i7 4770k - 4.7Ghz @ 1.330v LLC Extreme (L310B492)
    G.Skill F3-1700CL9D-8GBXM DDR3-2133mhz 9-11-10-28 1.65v @ 2800mhz 12-14-14-35 1.7v
    Samsung Green 8GB 2x4GB MV-3V4G3D/US DDR3 1.3v 30nn @ 2200Mhz 11-11-11-32 1.60v
    Sapphire ATI HD 7970 3GB clocked 1200MHz @ 1.181v.
    HiS ATI HD 6950
    Samsung 840 Pro 256GB SSD (boot Drive) on Intel sata3 controller port0
    Corsair Force GT 120 GB Sata3 SSD on Intel sata3 controller port1
    Samsung 320GB HD322GJ 7200 RPM 16M cache on Intel sata3 controller port2
    Sony Optiarc DVD-RW AD-7240S on Intel sata3 controller port5
    CORSAIR CMPSU-850TX PSU
    Swiftech MCP655-B Pump
    EK Supremacy Cpu Block
    Swiftech Mcres Micro Rev 2 Reservoir
    Black Ice GTX Xtreme 360 Radiator





  8. #8
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    Default Re: New system has boot loops

    Going to try the CMOS clear when I get home. Hope that does it. Thanks everyone for the help.
    Antec Nine Hundred ATX Mid Tower Computer Case
    GIGABYTE GA-EP45-UD3P Intel P45 ATX Intel Motherboard v1.6 BIOS FB
    EVGA GeForce GTX 275 PCI Express Video Card
    PC Power & Cooling S75QB 750W ATX12V Power Supply
    Intel Core 2 Quad Q9650 3.0GHz
    OCZ Reaper HPC Edition 4GB (2 x 2GB) SDRAM DDR2 800 (PC2 6400) Kit Desktop Memory
    Western Digital Caviar Black WD1001FALS 1TB 7200 RPM SATA 3.0Gb/s
    HP 22X DVD Burner SATA Model 1170i
    AuzenTech AZT-FORTE X-Fi Forte 7.1 PCI Express Sound Card
    ZALMAN CNPS 9700 NT
    Windows Vista Home Premium 64 bit

  9. #9
    Acebmxer's Avatar
    Acebmxer is offline Gigabyte Elite
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    Default Re: New system has boot loops

    was the post about bent pin in the cpu socket the cause of your reboot loop?
    Main Rig
    Gigabyte z87x-OC
    Haswell i7 4770k - 4.7Ghz @ 1.330v LLC Extreme (L310B492)
    G.Skill F3-1700CL9D-8GBXM DDR3-2133mhz 9-11-10-28 1.65v @ 2800mhz 12-14-14-35 1.7v
    Samsung Green 8GB 2x4GB MV-3V4G3D/US DDR3 1.3v 30nn @ 2200Mhz 11-11-11-32 1.60v
    Sapphire ATI HD 7970 3GB clocked 1200MHz @ 1.181v.
    HiS ATI HD 6950
    Samsung 840 Pro 256GB SSD (boot Drive) on Intel sata3 controller port0
    Corsair Force GT 120 GB Sata3 SSD on Intel sata3 controller port1
    Samsung 320GB HD322GJ 7200 RPM 16M cache on Intel sata3 controller port2
    Sony Optiarc DVD-RW AD-7240S on Intel sata3 controller port5
    CORSAIR CMPSU-850TX PSU
    Swiftech MCP655-B Pump
    EK Supremacy Cpu Block
    Swiftech Mcres Micro Rev 2 Reservoir
    Black Ice GTX Xtreme 360 Radiator





  10. #10
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: New system has boot loops

    Let us know how you get along with clearing your CMOS. It does not always take a hour or more, but sometimes it can.

    My suggested method is posted here in post #2 >>
    http://forums.tweaktown.com/f69/bios...h-guide-27576/

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