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PC monitor keeps going black but the tower still runs

Discussion in 'Hardware' started by sharpo1, May 28, 2015.

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  1. sharpo1

    sharpo1 Thread Starter

    Joined:
    May 28, 2015
    Messages:
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    hello there, my desktop PC keeps randomly having the monitor go black with a message coming up saying no signal however this is not all. if i am watching a video it will loop the sound also, so its just turns into an elongated humming noise. does anyone know what to do? i have taken it to a technician he said he took it apart and rebuilt it and left it on for around 2-3 days and this didn't happen. over the course of 10 days he tested what he could and still did'nt know. i got the pc back around 3-4 days ago and it's only just started happening again. i have 7 fans and a big cpu heatsink so im not sure its temperature.

    the computer remains on and humming normally throughout all of this. i have tried different hdmi cables also and no difference.

    what info would you guys need?
     
  2. Tanis

    Tanis

    Joined:
    May 29, 2006
    Messages:
    3,969
    First Name:
    Shane
    Hi and welcome to TSG.

    Based on your description of the fault my first checks would be on the GPU itself. However, as we have absolutely no knowledge of the PC you are talking about it is a little hard to make and informed response.

    Please provide the exact make and model of the PC, assuming it is a 'big brand' make like a HP, Dell, Asus etc. Also let us know if you have changed any hardware in it.

    If it is a self / custom build please provide the exact make and model of the Motherboard, CPU, GPU, RAM, Power Supply etc. the more info the better.

    What operating system are you using, is it 32 or 64 bit and is it fully patched and up to date?

    Are all your drivers fully patched and up to date?

    Exactly where are the fans located in your case and are they blowing air in or out? :Having more fans does not necessarily mean better cooling, it can infact degrade the cooling efficiency of the system if there are too many or they are setup badly.
     
  3. sharpo1

    sharpo1 Thread Starter

    Joined:
    May 28, 2015
    Messages:
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    hey there. i built the computer myself.

    i am using an MSI X99 sli plus motherboard

    16gb ddr4 crucial ballistix ram 4 sticks at 4gb each

    intel core i7 5820k 3.30 ghz cpu

    64 bit windows 8.1

    EVGA geforce gtx 970 graphics card

    EVGA super nova 850w psu

    be quiet! shadow rock2 heatsink

    one 140mm mill fan at the top facia back sitting intaking

    one 120mm fan at the bottom facia front sitting intaking

    two 120mm fans at the front facia bottom sitting intaking

    one 120mm fan at the back facia top sitting exhuasting

    plus the heatsink fan and the 2 gpu fans.

    as far as im aware all my drivers are up to date.

    UPDATE
    __________

    it's started making black/white lines flash horizontally across the bottom of the monitor just before it goes black now. literally for a split second. however it sometimes recovers after it goes black and then proceeds on normally (as if nothing is wrong) for however long.
     

    Attached Files:

  4. Tanis

    Tanis

    Joined:
    May 29, 2006
    Messages:
    3,969
    First Name:
    Shane
    If I have read this fan setup correctly, I think you air flow is inefficient and could do with a slight change, see my comments in red above.

    Your graphics drivers are out of date, your DXDiag shows you running version 347.52 and the current version from Nvidia is 353.06. Admittedly those were only release yesterday but there are 3 other versions between those and yours.

    Do you know what your temps and voltages are like?
    If not, please download Speccy from here. Once installed go through the following steps to publish the report online:

    1.In Speccy, click File, and then click Publish Snapshot.

    2.In the Publish Snapshot dialog box, click Yes to enable Speccy to proceed.

    3.Speccy publishes the profile and displays a second Publish Snapshot. You can open the URL in your default browser, copy it to the clipboard, or close the dialog box.

    Copy and paste the URL to a reply here.
     
  5. sharpo1

    sharpo1 Thread Starter

    Joined:
    May 28, 2015
    Messages:
    3
    ive just downloaded the driver and im adding the url here. i turned the computer on around an hour or so ago, after i woke up and had to restart it around 5/6 times before it would let me start downloading the updates for nvidia.

    http://speccy.piriform.com/results/4XKNsI63GmOQhV5qwNFlXbI
     
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