• Creator
  • #2152497

    PC only runs with cover off?


    by connectpc ·

    PC only runs with cover off?

    My PC shuts down when the cover is on and I must shut it down manualy from the on/off button,and the on/off button is staying on “green” static even though there is nothing functioning on the pc…. with the cover off it appears fine…..

    Bad Power Supply?
    Bad Capacitor(s) on Motherboard?
    Bad Fan(s)?

    I appreciate any input!

All Answers

  • Author
    • #2767454


      by connectpc ·

      In reply to PC only runs with cover off?


    • #2767451

      All the above?

      by kenone ·

      In reply to PC only runs with cover off?

      Check the fans, that’s easy. Power supply would be my next guess.

    • #2767450


      by the scummy one ·

      In reply to PC only runs with cover off?

      I once had a PC that refused to turn on unless one held the top of the case with 1 hand. It was flawless after that.
      We replaced everything in the case except the power switch, and the problem remained. Funny thing is we tried putting things on top of it, and it never worked unless someone was touching it (even lightly), and it was a plastic case, so no current was being transferred.

      In your case, make sure that everything is snug, and there is nothing blocking fans, etc..
      make sure that wiring is out of the way, and the case side is not grounding anything. Check that wires arent cut or have the insulation removed anywhere

    • #2767448

      Could be all of those…

      by thumbsup2 ·

      In reply to PC only runs with cover off?

      … more than likely though, it’s heat related. So, start with looking at (possibly replacing) the case, CPU and/or Power Supply fans. And remember, just because they’re turning doesn’t mean they’re turning fast enough to cool the components.

      Also check for dust buildup.

      • #2767438


        by connectpc ·

        In reply to Could be all of those…

        Thanks for the quick response!

        I was thinking that it is not cycling correctly and thought the best bet was to replace the power supply, evrything else looks okay, the cooling fans the capacitors etc,,,,etc,,,the pc is 8 years old…. what do you think?

        • #2767429

          8 years old?

          by churdoo ·

          In reply to Replace???

          I think it’s time for a new one, but that’s just me. 🙂

        • #2767371

          You can get a referb pc for $200

          by jdclyde ·

          In reply to Replace???

          Definitely not worth putting money and time into an 8 year old system.

          tigerdirect has referbs all the time, that is where I get them from and have had zero problems with them.

    • #2767436

      How long does the computer run with the cover on?.

      by peconet tietokoneet ·

      In reply to PC only runs with cover off?

      Is this an intermittent shut-down or does it shut-down straight away?.
      Sometimes there is a small cover switch of which is an alarm, what this small switch does is sound an alarm when the cover is off, so this small switch might be the cause of your problem. Go into your BIOS, press F1, F2, DEL key depending on your setup, and look for something like “side cover alarm” and mark it “disable”. Hopefully this should sort it out.

      • #2767433

        shuts down……

        by connectpc ·

        In reply to How long does the computer run with the cover on?.

        It shuts down in a matter of minutes, sometimes a few other times and sometimes several minutes.

        • #2767427

          This computer should be EARTHED…..

          by peconet tietokoneet ·

          In reply to shuts down……

          It does sound like a case alarm, i have a small switch on my old Windows ME system, i make sure that it pressed now and again to make sure it is working. Also make sure that the case is earthed. It should be from the power supply box. The thought of static could also be the cause, make sure that the power supply is well connected (metal to metal) to the case in question and does not have any gaps so as to give good contact. Is the case near the floor?, if so raise it a little so it is clear of the floor, make sure it is well vented.

      • #2768630

        ongoing pc shutting down

        by connectpc ·

        In reply to How long does the computer run with the cover on?.

        …. listen to this, when the computer is sitting with no keyboard/mouse/monitor — just booted up at the welcome screen *(xp home edition)WITH the cover ON it runs for hours!? — no hitches/ it is up on a testing bench, and I had it up on a couple of used dvd’s on the carpeted floor in its normal (new spot,just moved from a hardwood floor scenario)thought that if it was raised a “tad” that would help with air flow….on the carpet. Perhaps it needs to be raised even higher off the carpeted enviroment? ???
        OOOOOh and by the way I ran Toolstar diagnostics and everything passes, though it does not address fan/power supply testing.

        • #2768617

          Could try to make sure that the computer in question….

          by peconet tietokoneet ·

          In reply to ongoing pc shutting down

          Is sitting on a wooden base so as to make sure that any static is kept at minimum.
          When you had it on the wooden floor, did it work ok?. If so then that would be your answer, place the computer on a wooden base.
          Hope all goes well.

    • #2767415

      Along with the other suggestions

      by rob miners ·

      In reply to PC only runs with cover off?

      Faulty Fans, Dust and Grime build up on the Heatsink restricting air flow. I would give the inside of the case a blowout with compressed air. When blowing air through the fans make sure that you physically stop them from spinning, as they may generate power and blow something up. Remembering to ground yourself by placing the back of your hand on the Power Supply Unit and not moving your feet. By not taking this precaution it is possible that you could inadvertantly cause damage to the PC from an electrostatic discharge. Then remove the Heatsink, giving it a thorough clean and reseat the CPU applying new CPU grease. If the Fans spin freely when you give them a spin they are probably OK. If there is resistance replace them.

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