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Computer won’t boot, fan starts and stops, motherboard flashes

By Primativ · 6 replies
May 13, 2018
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  1. My computer would not start today. I pushed the start button and the case fan would spin a little and stop repeatedly, the graphics card light would flash, the mother board has an ezdebug feature and the light next to the cpu option was blinking. That’s as much as it will do now. The fan will even spin for a bit after I flip the power switch off, but eventually stops.

    I have looked online for fixes, I cleaned out the dust with compressed air, I have tried plugging the power cord into a different outlet, removed and reinstalled the MOBO battery, held the start button after turning off the power, reinstalled the graphics card (which I had to take out to get to the battery). So far no changes.

    I built the computer over a year ago and until now it worked fine. If anyone has a fix for this please help me.

    Here are the computer specs

    tower cooler- Cryorig h7
    CPU- Intel core I7 4ghz
    Hardrive- sandisk ssd plus 240 gb solid state drive
    Power- Corsair cx600 600w
    Video card- MSI Geforce gtx 1060
    Motherboard - MSI B150M bazooka
    Windows 10
  2. tipstir

    tipstir TS Ambassador Posts: 2,842   +193

    Sounds like the PSU - Power Supply Unit might be faulty. You could get a multi-tester to check out the PSU to see if AC/DC or Volts are correct before you go out and buy another one much larger one. Can you tell me what happen prior to this problem. Did this hardware ever work? If it did what happen? Did you have Brown-out that's when the power goes off and quickly goes back on.
  3. Primativ

    Primativ TS Rookie Topic Starter

    Would you have to unplug the entire power supply unit to test it?

    I’m not sure if there was a brown out, but we had been switching off the power to different rooms in the house. Although I’m not sure if it stopped working at the exact same day.

    The computer worked fine for a year. In the last few months it would sometimes not start unless I turned off the power strip connected to the wall outlet and then turned it back on.

  4. Cycloid Torus

    Cycloid Torus Stone age computing - click on the rock below.. Posts: 3,921   +1,157

    Sounds more like a PSU problem than anything else, but other candidates can include voltage regulation on motherboard and a bad fuse on your power strip. "Test Power Supply with multitester" - (search in YouTube)

    If your exdebug translates to a specific alert (check manual) tell us about that. Otherwise, in your shoes I would disassemble everything and build it back bit by bit while checking for the 'right' error alerts from ezdebug and/or beep codes (I.e, if memory and video card are removed, alert should point at error in RAM, replace RAM and error should point at video card, etc). If no error report it is because something really basic is broken, then it is PSU, motherboard, CPU - easiest to check is to replace PSU with a known good. CPUs and motherboards can be checked at local repair shop but try to prove their reputation before going in for help.

    If anyone knows a way to check CPU or motherboard individually, I would love to hear it. None of my multiple systems or those of my 'best' friends are compatible....
  5. tipstir

    tipstir TS Ambassador Posts: 2,842   +193

    Back in the day the CPU would be checked by swapping it out for another one. But let's work on PSU. RAM swapping can be tricky Could be bad Video Card but most likely it is the PSU.
  6. tipstir

    tipstir TS Ambassador Posts: 2,842   +193

    Let me get this straight the system as been running none stop for year? Have you connected the computer to another wall outlet. O try to use a different power strip. To tell if that power strip is gong bad could be faulty also. Try swapping that out as well. PSU sounds like it has gone bad. There are a few things you can try.. Swap out power cords, Swap out the outlets, You should have APC on that computer to prevent power issues. Do you get a lot of brown-outs and you shutdown the power in the room that doesn't mean much. Open the case don't touch anything turn it on does the CPU fan spin fast right away or does it spin slow... The case fan also does it do the same thing?
  7. Primativ

    Primativ TS Rookie Topic Starter

    Ok thanks for the replies. I think I fixed my issue. While I was looking at my motherboard I noticed that the cpu fan was connected to the sys fan outlet, and that one of the case fans was connected to the motherboard cpu fan outlet.
    I swapped the position of these cables and tried to start the computer. It started up perfectly. I am amazed that it worked so long with these cables out of order.

    Thanks again!
    Cycloid Torus likes this.

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