Questions

PC only runs with cover off?

+
0 Votes
Locked

PC only runs with cover off?

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!
  • +
    0 Votes
    Kenone

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

    +
    0 Votes
    The Scummy One

    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.
    lol

    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

    +
    0 Votes
    ThumbsUp2

    ... 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.

    +
    0 Votes
    connectpc

    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?

    +
    0 Votes
    Churdoo

    I think it's time for a new one, but that's just me. :-)

    +
    0 Votes
    jdclyde

    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.

    +
    0 Votes

    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.

    +
    0 Votes
    connectpc

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

    +
    0 Votes

    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.

    +
    0 Votes
    connectpc

    .... 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.

    +
    0 Votes

    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.

    +
    0 Votes
    Jacky Howe

    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 **** 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.

  • +
    0 Votes
    Kenone

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

    +
    0 Votes
    The Scummy One

    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.
    lol

    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

    +
    0 Votes
    ThumbsUp2

    ... 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.

    +
    0 Votes
    connectpc

    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?

    +
    0 Votes
    Churdoo

    I think it's time for a new one, but that's just me. :-)

    +
    0 Votes
    jdclyde

    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.

    +
    0 Votes

    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.

    +
    0 Votes
    connectpc

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

    +
    0 Votes

    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.

    +
    0 Votes
    connectpc

    .... 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.

    +
    0 Votes

    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.

    +
    0 Votes
    Jacky Howe

    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 **** 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.