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Computer screen stuck off, light on standby

Discussion in 'PC Hardware' started by coolline3, 2008/08/19.

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  1. 2008/08/19
    coolline3

    coolline3 Inactive Thread Starter

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    After i have been on the computer for more than an hour sometimes my computers screen goes off and comes up with nhe message "no signal input" in a blue box. I press some keys and move my mouse, nothing. I turn the screen off and on again, but its STUCK in standby :confused:. The only way i can turn it of is by unplugging it or holding down the power button.

    I know about things on the computer and i know a little scripting, but have not a clue whats in the tower so dont come out with things like clean your CPU as i have not a clue what it is. Maybe you could give me a link to a picture of it if i needed to do something in the tower.
     
    coolline3,
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  2. 2008/08/19
    rsinfo

    rsinfo SuperGeek Alumni

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    This means that the monitor is not receiving any signals from your computer. When does it happen ? When you are working on it or when its left idle ?

    Unplug turn off what ? The monitor or the computer ?
     
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  4. 2008/08/19
    coolline3

    coolline3 Inactive Thread Starter

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    When i've been on my computer for 1 hour - 3 hours

    Whilst im working on it, usually playing Runescape, but Runescape's not the problem


    Unplug the socket in the wall or hold down the power button on the tower.

    My monitor isn't the problem, its the tower, ive tested my monitor on my other computer and it works fine.
     
    Last edited: 2008/08/19
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  5. 2008/08/19
    PeteC

    PeteC SuperGeek Staff

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    This could be a heat problem - is there a fan on the graphics card and is it working? Are your case fans working?

    I suggest you open up the case - dedust if necessary and remove the graphics card assuming it is a plug in card, clean the contacts with a soft pencil eraser, down each contact, not across, degrease and refit. Test.
     
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  6. 2008/08/19
    coolline3

    coolline3 Inactive Thread Starter

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    My grapics are onboard. all the fans seem to work. its a bit dusty, im waiting to get dry air in a can, thats what you use.
     
    coolline3,
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  7. 2008/08/19
    PeteC

    PeteC SuperGeek Staff

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    Let's get some data on the temperatures after the computer has been running - and used hard, for an hour, say .....

    Download, install and run Everest and go to Computer > Sensors and post the temps listed.
     
    PeteC,
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  8. 2008/08/19
    mclark1129

    mclark1129 Inactive

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    I had a similar problem with an ATI graphics card that I was using on another machine. Usually the monitor would shut off when I was playing World of Warcraft or some other 3d graphics intensive game. If I didn't do anything the computer would eventually restart by itself. When it restarted I would get a message stating that a Stop Error occured in relation to my graphics card. I don't remember the exact details of the message, but I do suspect that the stop error was being caused by heat. I would recommend letting the computer sit for about 5-10 minutes after the screen goes blank to see if it will restart on its own, before forcing a system shutdown. If the comptuer restarts and you get any messages, it will provide a greater insight on what may be going on with your system.

    Good luck,

    Mike
     
    mclark1129,
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  9. 2008/08/19
    coolline3

    coolline3 Inactive Thread Starter

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    double posted
     
    Last edited: 2008/08/19
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  10. 2008/08/19
    coolline3

    coolline3 Inactive Thread Starter

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    After 2-3 hours...

    27 celcius motherboard
    52 celcius CPU :O
    34 celcius seagate
     
    Last edited: 2008/08/19
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  11. 2008/08/19
    PeteC

    PeteC SuperGeek Staff

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    The motherboard and hard drive temps are fine, but the CPU is on the high side. Whether or not this is the source of your problem is open to question, but I would suggest cleaning the fan and the heat sink....

    Under no circumstances remove the heat sink from the processor. The processor unit and fan/heatsink assembly is easy to identify - the fan is raised up on a finned aluminium block, the heat sink. With the computer powered down clean the dirt off the fan with a stiff brush - prevent the fan from turning using a cocktail stick or similar. Use the cocktail stick to clear out the dust from between the cooling fins - you will probably need to access between the fan blades. Then blow the dust out - do not use a vacuum cleaner as this can do more harm than good. Be careful not to touch any of the chips on the motherboard or on any of the plug in cards or knock or tug on any of the leads. Work with a good light source slowly and methodically.

    When you have dedusted post some further temperature data.
     
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  12. 2008/08/19
    coolline3

    coolline3 Inactive Thread Starter

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    Can you say that again, just 100 times easier please. Whats are the the things you just said and what do they look like?! A link to photos would help, P.S. im on my psp as the CPU was so hot so you'll have to wait 'till the morning/afternoon for results
     
    Last edited: 2008/08/19
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  13. 2008/08/19
    PeteC

    PeteC SuperGeek Staff

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    I have spelt out what you need to do in the simplest possible terms :) Be brave - open the case and the CPU fan and heatsink will be obvious. To assist I have attached an image of the interior of a typical PC - the CPU fan is the large fan visible in the upper left quartile of the image.
     

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  14. 2008/08/19
    coolline3

    coolline3 Inactive Thread Starter

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    the thing below the power suply needs cleaning?
     
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  15. 2008/08/19
    PeteC

    PeteC SuperGeek Staff

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    Yes - shown arrowed below.

    If you are not confident to work inside the case then you should not do so - do you have a computer savvy friend who could help you?
     

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  16. 2008/08/20
    coolline3

    coolline3 Inactive Thread Starter

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    yes, but im not going to see him for one week and hes not going to be at my house for atleast three months. I am ok with working in the tower but the only name i know of the stuff is the motherboard.

    Im more of a software person.
     
    Last edited: 2008/08/20
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  17. 2008/08/20
    coolline3

    coolline3 Inactive Thread Starter

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    All clean, these tempretures are worrying as soon as i started my computer though...

    21 *C Motherboard
    39 *C CPU!
    16 *C Seagate

    5 Mins Later...

    24 *C Motherboard
    42 *C CPU!
    22 *C Seagate
     
    coolline3,
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  18. 2008/08/20
    PeteC

    PeteC SuperGeek Staff

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    I would not be concerned about these temperatures - the motherboard and hard drive are well below acceptable limits and the CPU temp is not excessive either, particularly if you have an Intel processor. The cleaning operation has been beneficial it would seem.

    To set your mind at rest, maybe :), my box has been on for over 3 hours today and the temps are .....

    Motherboard 36 deg C
    CPU (AMD) 31 deg C
    Hard drive 1 34 deg C
    Hard drive 2 30 deg C
    Hard drive 3 37 deg C

    It is also inportant to remember that the sensors are not necessarily accurate.

    I will think further on your problem and will respond later when I am next available.
     
    PeteC,
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  19. 2008/08/20
    coolline3

    coolline3 Inactive Thread Starter

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    TEMPS AFTER 1 HOUR!

    Motherboard 28 °C (82 °F)
    CPU 47 °C (117 °F)
    Seagate ST380020A 34 °C (93 °F)

    Temps after 2 Hours...


    Motherboard 28 °C (82 °F)
    CPU 41 °C (106 °F)
    Seagate ST380020A 34 °C (93 °F)

    Atleast is not 50 like it was.. my prosessor is Presario, About 5 Years old.
     
    Last edited: 2008/08/20
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  20. 2008/08/20
    coolline3

    coolline3 Inactive Thread Starter

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    all of the inside of my computer is dusty, how do i clean things like the motherboard?
     
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  21. 2008/08/20
    mclark1129

    mclark1129 Inactive

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    One thing that causes CPU temperatures to rise computers get older is the fact that the thermal paste between the heatsink and the CPU loses a bit of its effectiveness after awhile. You can get new thermal paste from sites like www.newegg.com for around $5.00 or so, but reapplying thermal paste is a very sensitive process and I wouldn't recommend it to a novice. You can also look into getting a new, more powerul case fan for your machine if you're still concerned by the temperatures.

    As long as the cleaning fixed your original problem, I'd leave well enough alone though.

    Most of the time a good spraying of MB with your air can does the trick. I usually don't mess with much more than that out of fear of damaging something on the MB.

    Mike
     
    Last edited: 2008/08/20
    mclark1129,
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